# IOQM Discussion

This discussion is mainly for the Pre-Regional Mathematics Olympiad held in India. However, anyone who wants to practice good Math questions, you are welcome! Also, I'll be mentioning some great teachers, who are known for their excellent problems!

Edit : IOQM instead of PRMO

The rules are:

• Post problems related to PRMO.

• Don't post repeated problems(I mean if someone has posted it already, don't post again).

• You may check out the level of problems from Zakir Husain Sir's A Pre-RMO question (whole series!).

• Some sample questions can also be found here.

• Past year problems are also welcome.

• Don't post comments not related to any problem.

• Don't write the answers in the comments.

• If you are not posting a problem yourself, and find a good problem in the Community(old or new), please post it here.

• If you learnt any new concept, do share it with us!

• Let's together do Math!

Note by Vinayak Srivastava
7 months, 1 week ago

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

• Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
• Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
• Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
• Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$ ... $$ or $ ... $ to ensure proper formatting.
2 \times 3 $2 \times 3$
2^{34} $2^{34}$
a_{i-1} $a_{i-1}$
\frac{2}{3} $\frac{2}{3}$
\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

## Comments

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Top Newest
- 7 months, 1 week ago

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Here, I learnt a great concept. Do check it out, Holder's Inequality. It is used to solve many PRMO and RMO problems.

- 7 months, 1 week ago

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Nice! But it involves integrals, I have not studied them. I only know differentiation.

- 7 months, 1 week ago

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I am unable to understand its proof.:-(

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- 7 months ago

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These question are not of prmo level. They might be of nmtc level.

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I am not a liar :( BTW, what is ntmc?

- 7 months ago

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Ok,you are not.

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Google says: National Telecommunication Monitoring Centre

- 7 months ago

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National mathematical contest test. It is slightly less harder than prmo.

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Oh, I searched ntmc, you wrote nmtc. I will search it. Thanks for telling!

- 7 months ago

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The paper looks hard to me, though.

- 7 months ago

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Do you know co-ordinate geometry and locus???

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No, it is $x$th chapter and I have reached $x-3$th chapter in my book. Also, I haven't studied Math from many days, I was doing my school work, which is still less than half done.

- 7 months ago

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That's why you find it difficult.

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National Mathematical Talent Contest, not National mathematical contest test @Kriti Kamal - Even though this is something Indian, and you will know better, I know I'm right because Google says so :)

- 7 months ago

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Yes,you are right.

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- 2 weeks, 4 days ago

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I'm preparing for PRMO too!

- 7 months, 1 week ago

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Nice! Do share any good problems you find!

- 7 months, 1 week ago

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Well, my mother is Indian, so I can wish you all good luck!

- 7 months, 1 week ago

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- 7 months, 1 week ago

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I couldn't solve it, please post a solution.

- 7 months ago

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I am a bit busy now.but, i will post it before 9pm.@Siddharth Chakravarty,please if you are free then post the answer.

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I have posted a solution. :-) @Vinayak Srivastava.

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Check this problem, I have deleted the other one

- 7 months, 1 week ago

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- 7 months ago

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@Vinayak Srivastava,i will post mainly geometry problems.

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No problem!

- 7 months ago

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Do you know ceva's theorem?

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No, I'll Google it now.

- 7 months ago

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I answered it, good that I told you the previous question was wrong otherwise a lot of people who have got it wrong.

- 7 months ago

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Is anyone else getting a Brilliant glitch like thing? My notifications have disappeared and I'm only checking gmail for notifications. @Siddharth Chakravarty, @Vinayak Srivastava, @Kriti Kamal

- 7 months ago

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No, but I hate this new UI.

- 7 months ago

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Yes, something similar is happening to my UI as well. It's full screen and I can't see any notifications as well. The solutions are also aligned to left and not in centre. Definitely something weird is happening, maybe an update?

- 7 months ago

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I just clicked on "View full site" in the top menu, it is as it was.

- 7 months ago

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I got no other change, just that it was changed to mobile site, I changed back to full site. Are you all seeing other changes I can't?

- 7 months ago

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You are awesome! It worked! Turns out I was somehow in mobile site mode. LOL Thanks!

- 7 months ago

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Guys do what Vinayak said, and click View Full Site, it worked for me. @Siddharth Chakravarty, @Mahdi Raza

- 7 months ago

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Please elaborate how i can do it. This view is Very frustrating

- 7 months ago

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Ok nevermind, I got it. Thanks!!!

- 7 months ago

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The menu where you open notifications, below them, there are many buttons, click on vie full site.

- 7 months ago

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Answer to life, universe and everything: $\Large{\left \lceil{{\pi}^{\pi} \times \ln(\pi)}\right \rceil}$

- 7 months ago

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Close, but not quite - 41.739323805 :)

- 7 months ago

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I have already put the Ceiling function :)

- 7 months ago

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Oh! Didn't notice that :)

- 7 months ago

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He has included ceiling function, it will be 42

- 7 months ago

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Oh! Didn't notice that :)

- 7 months ago

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The actual answer is $101010 \implies 42$ in binary

- 7 months ago

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You mean 42 in decimal, because binary is only using 1's and 0's

- 4 months ago

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No, I meant that 101010 is 42 but in binary format

- 4 months ago

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$\Large e^{i \pi} + 1 = 0$

This is still better than that in my opinion :)

- 7 months ago

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We can make notes on these famous and beautiful equations LOL

- 7 months ago

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in which grade are you

- 7 months ago

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9th grade.

- 7 months ago

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is it 42?

- 4 months ago

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Try this problem Future of 2020?

- 7 months ago

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okay

- 7 months ago

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@Vinayak Srivastava,@Aryan Sanghi. do this question https://brilliant.org/problems/problem-is-for-testing-skills/?ref_id=1599194

- 7 months ago

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The problem is wrong again @SRIJAN Singh

- 7 months ago

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no

- 7 months ago

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@Percy Jackson no, its right

- 7 months ago

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An irregular hexagon, can't have all congruent angles bro! @SRIJAN Singh

- 7 months ago

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noooooooooo if you want the solution look i will post it @Percy Jackson

- 7 months ago

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Are you really sure @Percy Jackson? Because the problem is correct.

- 7 months ago

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Oh, now that I look at the solution, it does seem right. I have been taught that any hexagon with all angles equal is always regular, I guess that was only basic, and other factors come into play here. Sorry for the misconception @SRIJAN Singh, and Thanks @Siddharth Chakravarty for mentioning and telling me that it is correct :)

- 7 months ago

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You should change your school, you are taught the wrong things. Instead, it should have been regular hexagons always have all the interior angles equal. The easiest way to see this is that a regular quadrilateral is a square, while a rectangle is not a regular quadrilateral but still has all the angles equal. Regular polygon means having all angles and sides equal.

- 7 months ago

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Yes, maybe I haven't been paying attention in Geometry coz I hat it LOL, thank for clearing it up @Siddharth Chakravarty :)

- 7 months ago

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Your welcome (Some text)

- 7 months ago

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Lol 'some text' is an addictive thing started by Márton (some text)

- 7 months ago

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All Indians, check out the NAEST test. Registrations last date is tomorrow 7th August.

- 7 months ago

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@Vinayak Srivastava @Aryan Sanghi @Kriti Kamal @Mahdi Raza क्या सभी ने इसे देखा और रजिस्टर किया?

- 7 months ago

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Yes, but didn't get some confirmation email except for an OTP email

- 7 months ago

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Yes, I also.

- 7 months ago

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The first test is on 9th August, maybe they will send prior to the test.

- 7 months ago

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@Aryan Sanghi,@Mahdi Raza,@Vinayak Srivastava,@Siddharth Chakravarty hey everyone do you know about some international olympiad a 8th grader especially for math or science

- 7 months ago

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Try out NSEJS and PRMO. They are meant for 8th and 9th graders. :)

- 7 months ago

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@Aryan Sanghi,Yeah in FIITJEE there are exams conducted, that you are telling..thanks

- 7 months ago

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You can try nmtc too.

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@Kriti Kamal.thanks for your suggestion

- 7 months ago

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Try out this question by me. Infinite Geometric Geometry series!!

- 7 months ago

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This problem is not mine, but I found it good. Click Here!

- 7 months ago

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Is it 16?

- 1 month, 2 weeks ago

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@Aryan Sanghi,@Vinayak Srivastava,@Mahdi Raza lookProblem 3

- 7 months ago

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@Percy Jackson hey do My first physics probb yeah

- 7 months ago

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@SRIJAN Singh, it is good that you are posting nice problems of Physics, but please give the links, as it is difficult for some people who are unfamiliar with the interface to get to it.

The procedure of giving link is quite simple:

Just use $[$ and $]$ brackets and in between write the link text, then open the $($ bracket, paste the link, and then $)$

I am giving the links for your first 2 problems, please remember this for later problems.

Problem 1

Problem 2

Keep posting good problems, keep learning!

- 7 months ago

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Thanks for your suggestion me in class 7 try my problem I posted it now

- 7 months ago

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I haven't studied circular motion. I'll try it, but I don't know the concepts.

- 7 months ago

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How to paste the link can you explain again

- 7 months ago

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Just open the tab and copy the url, that's it.

- 7 months ago

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No that i know, but how that like you have written like Problem 1

- 7 months ago

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Open the [ bracket, then type inside, and then close it ]

 1 [Problem 1](https://brilliant.org/problems/my-first-physics-probb-yeah/?ref_id=1599518) 

- 7 months ago

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Hey there I learnt look down

- 7 months ago

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@Aryan Sanghi , @Mahdi Raza,@Percy Jackson . Bore na try this

- 7 months ago

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Try more practice makes man perfect try this

- 7 months ago

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@Vinayak Srivastava try this

- 7 months ago

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@Pranshu Garba, try this

- 7 months ago

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I was going through my old notes, and found this very easy problem which 100% will get right, LOL :D

If, 1=5

2=10

3=15

4=20

5=?

Now don't comment like 2 is not equal to 10, this is a logic problem but the meaning of the 'equal to' = symbol remains the same. :D

- 7 months ago

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25

- 6 months, 4 weeks ago

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Wrong 🙃

- 6 months, 4 weeks ago

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5 = 1, because in the first line 1 = 5, so 5 = 1 @Siddharth Chakravarty :)

- 6 months, 4 weeks ago

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ah! so silly

- 6 months, 4 weeks ago

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Ikr but I still like this problem, because it leaves everyone dumbfounded LOL

- 6 months, 4 weeks ago

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ah! you are online

- 6 months, 4 weeks ago

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hey @Percy Jackson do my problem

- 6 months, 4 weeks ago

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Got all of them correct :) @SRIJAN Singh

- 6 months, 4 weeks ago

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@Percy Jackson.show the solution:)

- 6 months, 4 weeks ago

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I didn't post it, because someone already posted solution before me, so no use of repeating the solution @SRIJAN Singh :)

- 6 months, 4 weeks ago

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please give me problem for doing @Percy Jackson

- 6 months, 4 weeks ago

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Check my profile then :)

- 6 months, 4 weeks ago

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@Percy Jackson i have done your first ten problems and got one incorrect

- 6 months, 4 weeks ago

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Good ☺️

- 6 months, 4 weeks ago

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Mine is better: \begin{aligned} &~~~\LARGE{\cdot \cdot} \\ &\Huge{\smile} \\ \end{aligned}

- 6 months, 4 weeks ago

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@Vinayak Srivastava what was your answer

- 6 months, 4 weeks ago

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I had seen it before, so I did not answer.

- 6 months, 4 weeks ago

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ah! hey can you post a good problem for me or everyone .i want to do some math practice

- 6 months, 4 weeks ago

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@Vinayak Srivastava. pls give reply

- 6 months, 4 weeks ago

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@SRIJAN Singh - Click Community and search for problems there, there are many interesting problems. Not everyone is online always so please be patient or search in the community. Thanks!

- 6 months, 4 weeks ago

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i had tried many problems from community but some are not of my level

- 6 months, 4 weeks ago

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Well, we also post problems of that level.

- 6 months, 4 weeks ago

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ookkaayy

- 6 months, 4 weeks ago

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hey i solved many problems from community section please give me more problems @Vinayak Srivastava,@Aryan Sanghi,@Percy Jackson,@Siddharth Chakravarty

- 6 months, 4 weeks ago

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Dude, please stop it. It is irritating because when you mention us, 2 notifications come. @SRIJAN Singh

- 6 months, 4 weeks ago

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hey i'm not irritating you .i'm love with maths that's why i want to do further more problems

- 6 months, 4 weeks ago

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First thing, whether you irritate me or not is my decision, and I think you are irritating. If you love math, just make problems by searching the internet and stop mentioning me. At least ask if it is ok to mention continuously. Also, Brilliant isn't the only place to do math.

- 6 months, 4 weeks ago

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1

- 4 months, 2 weeks ago

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What one?

- 4 months, 2 weeks ago

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I think he is answering Siddharth's problem, as it is clearly a reply to that. Use your brain sometimes Sing...

- 4 months, 2 weeks ago

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... no point telling him he will probably ask what" or something like that

- 4 months, 2 weeks ago

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true lol...

- 4 months, 2 weeks ago

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He didn't replied to that to siddharth comment so how i can say?

- 4 months, 2 weeks ago

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Gods, don't you have a brain, coz he clearly replied that as an answer to siddharth's comment.

- 4 months, 2 weeks ago

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@Vinayak Srivastava,@Mahdi Raza,@Aryan Sanghi,@Foolish Learner do very interesting

- 6 months, 4 weeks ago

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@Vinayak Srivastava,@Mahdi Raza,@Aryan Sanghi,@Foolish Learner do very interesting

- 6 months, 4 weeks ago

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first of all @Vinayak Srivastava,@Aryan Sanghi,@Siddharth Chakravarty,@Mahdi Raza,@Percy Jackson are my best friend because they give me support THANK YOU all for supporting me .

- 6 months, 4 weeks ago

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i don't think they are your best friends... maybe friends maybe?

- 4 months, 2 weeks ago

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I am not asking you ? Idiot

- 4 months, 2 weeks ago

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1. He never replied to your comment as a an answer to a question, so he can comment that, and there is nothing wrong with it.

2. If anyone's an idiot here, its you

3. What he has said, is also true. At least, I am not your best friend, I don't know about the others, but best friend is kinda too far, because we hardly know each other. You might be a friend to the others, to me you're just an annoying brat.

4. Don't reply to this. Get this in your head that unless you post one useful comment, you are doing the same thing Lam did in Nathan's Latex note. Your reply's are irritating enough already, Kat was right to call you a prick.

- 4 months, 2 weeks ago

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i regret telling kat off for calling him that

- 4 months, 2 weeks ago

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lol yeah

- 4 months, 2 weeks ago

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should i drop a nuke on him?

- 4 months, 2 weeks ago

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Sure, I wouldn't mind :)

- 4 months, 2 weeks ago

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well its not your average nuke but it is just as deadly and annoying can i test it on you to see if it works? it is still a prototype i will send u a small one

- 4 months, 2 weeks ago

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@Vinayak Srivastava if you are online see this

- 6 months, 4 weeks ago

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New problem @Vinayak Srivastava,@Percy Jackson.

- 6 months, 3 weeks ago

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Try this problem by me A Unique function

- 6 months, 3 weeks ago

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Try out my new problem: Are all numbers good?

- 6 months, 2 weeks ago

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@Vinayak Srivastava.do my new problem

- 6 months, 2 weeks ago

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Try this problem Co-Normal Parabolic Centroid

- 6 months, 2 weeks ago

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- 6 months, 1 week ago

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Try this problem Triangle of Reflection

- 6 months ago

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done

- 6 months ago

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I am shown no solvers?

- 6 months ago

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but got wrong

- 6 months ago

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Try this problem Areal Parabolic Centroid

- 5 months, 4 weeks ago

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I found this easy logic problem.However,you need to know the rules of cricket.

- 5 months, 4 weeks ago

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Wow! I calculated wrong! I knew the answer though.

- 5 months, 4 weeks ago

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@Vinayak Srivastava,I have seen in your profile that cricket is one of your interests.

- 5 months, 4 weeks ago

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Yes, but I added wrong, I knew that rule.

- 5 months, 4 weeks ago

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Extension: Answer should be $33n + 3$ runs for $n$ overs

- 5 months, 4 weeks ago

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Oh yes, I forgot, but I once saw a debate, where it was asking if 5 runs is possible or not.

- 5 months, 4 weeks ago

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I don't think so. It shouldn't be allowed. "All exceptions to be avoided" should be written in the question, but I guess it is assumed in the rules of cricket

If that is allowed through (shouldn't be, but anyway), then the total would be

$35(n-1) + 36 = 35n + 1$

- 5 months, 4 weeks ago

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And if 5 is allowed, then even 7 should be. That is possibly why 5 is not counted as well

- 5 months, 4 weeks ago

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I do think it is allowed in cricket.However,it is only possible when fielders are like me or ball is lost .:-P

- 5 months, 4 weeks ago

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Do you mean 33(n-1)+36 :-)

- 5 months, 4 weeks ago

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Yes, exactly. for each of the first $(n-1)$ overs, the batsman will take 33 runs. But in the last over he need not change the strike so he can hit all sixes which is 36 runs

\begin{aligned} \text{Total } &= 33(n-1) + 36 \\ &= 33n - 33 + 36 \\ &= \boxed{33n + 3} \end{aligned}

Which is what I wrote above

- 5 months, 4 weeks ago

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Ok

- 5 months, 4 weeks ago

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The problem becomes easy once you know the rules of Cricket, I had to google the rules of cricket for this.

- 5 months, 4 weeks ago

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so you cheated, or referred after getting it wrong? @Siddharth Chakravarty

- 5 months, 4 weeks ago

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Well I referred it before attempting, and then I read a whole wiki on a sport that doesn't interest me, and then got the question correct. I guess it is not cheating, as it is like knowing about a theorem to solve a problem :)

- 5 months, 3 weeks ago

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I was only interested in the 'sport that doesn't interest me' part. LOL Finally someone who doesn't think cricket is a big deal. The way Mahdi and Kriti talk about cricket makes me think that you need a degree in cricket to get into MIT and both of them passed the cricket exam with full marks lol XD

- 5 months, 3 weeks ago

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In India, Cricket has a huge fanbase, I mean really huge, so you could expect majority of people to love it :) I'm more into racket games like badminton and swimming.

- 5 months, 3 weeks ago

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Swimming, I'ma son of Poseidon. More into that :)

- 5 months, 3 weeks ago

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Actually,I am not interested in any sports.But,if you are Indian,then it is like common knowledge.You may not interested in cricket but,when your all friends are talking about cricket whole the day.Then, it's quite reasonable that you will know all about it without even playing it :)

- 5 months, 3 weeks ago

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lol XD, if you see my bio it is written get into MIT that means I need a degree in cricket.

- 5 months, 3 weeks ago

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- 5 months, 3 weeks ago

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Try this problem Highly Elliptical Area!!

- 5 months, 3 weeks ago

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Hi, I think I am new to the group, I found this geometry Problem which uses the properties of circles, rectangles and even triangles(based on your method)

- 5 months, 3 weeks ago

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Thanks! Beautiful geometry problems or even problems that have an elegant solution are always a pleasure to solve. Very few problems are being shared in this discussion/page. I expected a lot, but nevermind :(

- 5 months, 3 weeks ago

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@Mahdi Raza It was the least I could do! I hope that more people find and join this discussion and share some incredible problems.

- 5 months, 3 weeks ago

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Try this problem Ellipse's Circumscribed perimeter!. @Mahdi Raza

- 5 months, 2 weeks ago

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Try this problem Ellipse's Circumscribed perimeter!

- 5 months, 2 weeks ago

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Check out this easy limit problem: Limiting till the degree 5, @Aryan Sanghi I was talking about this.

- 5 months, 2 weeks ago

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It's easy I solved first! Check this! out

- 5 months, 2 weeks ago

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Please post a solution if you want, and I am still learning coding so I cannot help much maybe :)

- 5 months, 2 weeks ago

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Which type of language are you learning? ,I'll post the solution whenever I'll get time

- 5 months, 2 weeks ago

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Python

- 5 months, 2 weeks ago

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Nice,Me also Python btw what are you learning in that

- 5 months, 2 weeks ago

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Solved it. :) @Siddharth Chakravarty

- 5 months, 2 weeks ago

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- 5 months, 2 weeks ago

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- 5 months, 2 weeks ago

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Done!

- 5 months, 2 weeks ago

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- 5 months, 2 weeks ago

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@Vinayak Srivastava,@Percy Jackson,@Mahdi Raza,@Kriti Kamal,@Siddharth Chakravarty,@Aryan Sanghi,I wish you will like this problem

- 5 months, 1 week ago

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Solved it, thanks for sharing @SRIJAN Singh

- 5 months, 1 week ago

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Nice,Your welcome

- 5 months, 1 week ago

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- 5 months, 1 week ago

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Nice one But I have not studied calculus yet

- 5 months, 1 week ago

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@Percy Jackson .I am first to solve your problem...wait I'm posting the solution

- 5 months, 1 week ago

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ok, I am also posting solution

- 5 months, 1 week ago

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Yes post it Btw how did you use limit function,I don't know how to use latex.Is there any wiki that can teach me how to use latex

- 5 months, 1 week ago

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Pall Marton's Latex Guide

- 5 months, 1 week ago

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Okay

- 5 months, 1 week ago

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PLS comment on my chatbot one

- 5 months, 1 week ago

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- 5 months, 1 week ago

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- 5 months, 1 week ago

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- 5 months, 1 week ago

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Try this problem Ellipse's circular tangents!!

- 5 months, 1 week ago

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- 5 months ago

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Try this problem A Real Equation!!

- 5 months ago

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Try this problem Functional Complex Trignometry!!

- 4 months, 2 weeks ago

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Try this problem Cardinality of Inequations!!

- 4 months, 2 weeks ago

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Try this problem Highly Upvoted!!

- 2 months, 3 weeks ago

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It is deleted (-_-)

- 2 months, 2 weeks ago

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Yes, that's why in next comment I said-try this one instead. :)

- 2 months, 2 weeks ago

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ok :)

- 2 months, 2 weeks ago

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Try this problem by me instead High Summation!!

- 2 months, 2 weeks ago

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All the best to everyone giving IOQM and/or IOQJS tomorrow!

- 1 month, 2 weeks ago

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Thanks

- 1 month, 2 weeks ago

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Can someone please tell me the working in this problem:

If $a+b+2c=4, a>0,b>0,c>0$, then find minimum value of $\dfrac{1}{a}+\dfrac{1}{b}+\dfrac{2}{c}$

- 1 month, 2 weeks ago

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- 1 month ago

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Nice! Thanks! What was the motivation to write it as $a+b+c+c$?

- 1 month ago

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If u see the harmonic seq u see a $\frac{2}{c}$ so the only ways to make it in the AM was to either use $\frac{c}{2}$ or use $c$ twice but since we don’t know what $a+b+\frac{c}{2}$ I had to use the other one

- 1 month ago

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There are some questions you can see and find that you have to use ( if u want to do the question easily ) the QM-AM-GM-HM inequality. Once this set in your head that you have to use it, you will see how to split the variables to get the best results

- 1 month ago

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But yeah this comes with some practice

- 1 month ago

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Yeah, I just recalled that I have used this myself once here. I forget things quite fast! Anyway, thanks for your insight! But I don't think I have practised more than 1 or 2 this kind of problem.

- 1 month ago

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There is one last way to find out which I don’t use at all, when minimised all the terms in the expression separately will be equal ( here $\frac{1}{a} , \frac{1}{b},\frac{1}{c},\frac{1}{c}$), this can be useful for easier direct questions ( like this one ) but not for the ones which involve sums or products of inequalities

- 1 month ago

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LOL this is THE method I use most. Maybe I never encountered any hard problems which can't be solved by making all terms equal. :)

- 1 month ago

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U could try proving the nesbitt inequality $\frac{a}{b+c}+ \frac{b}{c+a}+ \frac{c}{a+b}$ is greater than $\frac{3}{2}$ using AM-HM ( there are other ways too, I never found it when I had first tried using AM-HM, I had to resort to rearrangement :) )

- 1 month ago

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Very silly of me, but I have missed a four in the first step so the answer is actually $\frac{1}{4}$

- 1 month ago

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It should be 4 not 1/4. Also in your solution you wrote it as 1/2c rather 2/c.

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Nice a mistake while correcting a mistake , I have edited the solution

- 1 month ago

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Do u mean u made a mistake while correcting ur mistake or did I say something wrong? 🤔

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No no I mean the mistake is on me, twice

- 1 month ago

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No problem with it, I got the trick, that is all the help which was required. Thanks.

- 1 month ago

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I think this is a nice problem in community: Generate this!

- 1 month, 1 week ago

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Can someone please explain this?

- 1 month, 1 week ago

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The answer is wrong because if all the coefficients leaving the first one are 0, and the first coefficient is any 3 digit perfect square then the answer is yes. First coefficient is the one with ${x}^{0}$