# PRMO 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!

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.

• 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
6 days, 10 hours 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 .
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Sort by:

- 4 days, 15 hours ago

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

- 4 days, 13 hours ago

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

- 4 days, 13 hours ago

Ok,you are not.

- 4 days, 13 hours ago

Google says: National Telecommunication Monitoring Centre

- 4 days, 13 hours ago

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

- 4 days, 13 hours ago

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

- 4 days, 13 hours ago

The paper looks hard to me, though.

- 4 days, 13 hours ago

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

- 4 days, 12 hours ago

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.

- 4 days, 12 hours ago

That's why you find it difficult.

- 4 days, 12 hours ago

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 :)

- 2 days, 21 hours ago

Yes,you are right.

- 2 days, 19 hours ago

- 6 days, 10 hours ago

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

- 6 days, 10 hours ago

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

- 6 days, 9 hours ago

I am unable to understand its proof.:-(

- 2 days, 17 hours ago

I'm preparing for PRMO too!

- 5 days, 22 hours ago

Nice! Do share any good problems you find!

- 5 days, 16 hours ago

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

- 5 days, 16 hours ago

- 5 days, 8 hours ago

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

- 4 days, 21 hours ago

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

- 4 days, 19 hours ago

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

- 3 days, 11 hours ago

Everybody please check this Discussion and mention others as I cannot mention anybody in the discussion, IDK why?

- 5 days, 8 hours ago

Check this problem, I have deleted the other one

- 5 days, 8 hours ago

- 2 days, 21 hours ago

@Vinayak Srivastava,i will post mainly geometry problems.

- 2 days, 18 hours ago

No problem!

- 2 days, 18 hours ago

Do you know ceva's theorem?

- 2 days, 17 hours ago

- 2 days, 17 hours ago

- 1 day, 23 hours ago

- 1 day, 23 hours ago

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

- 1 day, 22 hours ago

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

- 1 day, 22 hours ago

No, but I hate this new UI.

- 1 day, 21 hours ago

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?

- 1 day, 21 hours ago

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

- 1 day, 21 hours ago

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?

- 1 day, 21 hours ago

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

- 1 day, 21 hours ago

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

- 1 day, 21 hours ago

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

- 1 day, 21 hours ago

Ok nevermind, I got it. Thanks!!!

- 1 day, 21 hours ago

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

- 1 day, 21 hours ago

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

- 1 day, 20 hours ago

Close, but not quite - 41.739323805 :)

- 1 day, 20 hours ago

I have already put the Ceiling function :)

- 1 day, 20 hours ago

Oh! Didn't notice that :)

- 1 day, 20 hours ago

He has included ceiling function, it will be 42

- 1 day, 20 hours ago

Oh! Didn't notice that :)

- 1 day, 20 hours ago

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

- 1 day, 20 hours ago

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

This is still better than that in my opinion :)

- 1 day, 20 hours ago

We can make notes on these famous and beautiful equations LOL

- 1 day, 20 hours ago

- 1 day, 18 hours ago

- 1 day, 17 hours ago

Try this problem Future of 2020?

- 1 day, 12 hours ago

okay

- 1 day, 12 hours ago

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

- 1 day, 11 hours ago

The problem is wrong again @SRIJAN Singh

- 1 day, 11 hours ago

no

- 1 day, 11 hours ago

@Percy Jackson no, its right

- 1 day, 11 hours ago

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

- 1 day, 11 hours ago

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

- 1 day, 11 hours ago

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

- 1 day, 10 hours ago

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 :)

- 1 day, 9 hours ago

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.

- 1 day, 9 hours ago

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

- 1 day, 9 hours ago

- 1 day, 9 hours ago

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

- 1 day, 9 hours ago

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

- 1 day, 10 hours ago

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

- 13 hours ago

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

- 13 hours ago

Yes, I also.

- 13 hours ago

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

- 13 hours ago