# Swapnil's Messageboard - II

This is my newest messageboard. Feel free to express your views about anything. You can also comment on my problems and ask me questions about things in general. As mentioned on my previous messageboard, Please share Math olympiad problems here.

Cheers!

Regards, Swapnil Das

Note by Swapnil Das
6 years, 2 months 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.

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} $\boxed{123}$

Sort by:

Well, @Rajdeep Dhingra Can you please post some more projectile motion problems in your free time? I @Swapnil Das would be indebted! ( Just trying to see what happens when you mention yourself!)

- 6 years, 1 month ago

Hello Sir, I want your help. I am very weak in geometry , so I wanted to take some advice from you about it. Please tell me what shall I do to improve it. Thanks.

- 5 years, 10 months ago

Me too ! I am also weak in Geometry.

- 5 years, 10 months ago

well u've got lvl 4 n u r say'ng u r weak!!

- 5 years, 10 months ago

I have completed your set, but I think that you should mention that g=9.8,one can not take it 10

- 6 years, 2 months ago

Thank U! Gonna change it in 2 hours( Eating egg roll)!

- 6 years, 2 months ago

It takes two hours for you to eat an egg roll? :O :O

- 6 years, 2 months ago

Maybe a Jumbo one :P .....

- 6 years, 2 months ago

Well, That could be possible :P XD

- 6 years, 2 months ago

Or maybe he is a "snail" eater XD

- 6 years, 2 months ago

Nope, it was just a lengthy excuse!

- 6 years, 2 months ago

What is your favourite technique in all of mathematics ?

- 6 years, 2 months ago

Till now, my favourite is Fermat's little theorem.

- 6 years, 2 months ago

My favourite techniques are Induction and Invariance Principle.

By the way, I meant techniques, not theorems.

- 6 years, 2 months ago

- 6 years, 2 months ago

I love Fermat's Infinite Descent and also Simon's Favorite Factoring Trick.

- 6 years, 2 months ago

what happened to first message board?

- 6 years, 2 months ago

As to every messageboard, It died after two weeks!

- 6 years, 2 months ago

????

- 6 years, 2 months ago

No notice of notes after 2 weeks! It's a Brilliant ritual!

- 6 years, 2 months ago

i reall don't understand! i have created a new messageboard so i want to know.

- 6 years, 2 months ago

Your messageboard would be forgotten after 2 weeks!

- 6 years, 2 months ago

by whom and how??? also u stay at my hometown! bhubaneshwar!

- 6 years, 2 months ago

Ya! I do stay there! By the Brilliant Community as other important notes will bury your MB down!

- 6 years, 2 months ago

oh! u know odia?

- 6 years, 2 months ago

Obviously@Sarthak Rath

- 6 years, 2 months ago

@Ruchin Shroff Hello! Thanks for following me! R U new to Brilliant.org?

- 6 years, 2 months ago

Ya Just Registered at brilliant.org

- 6 years, 2 months ago

@Noel Lo Thanks for liking my prob!

- 6 years, 1 month ago

Thank you also for supporting my Logic Puzzle on the five siblings!

- 6 years, 1 month ago

My pleasure! @Noel Lo

- 6 years, 1 month ago

No worries! There are two other versions of the logic puzzle! The links for both are in the problem you just solved! Enjoy!

- 6 years, 1 month ago

which problem? can i get the link?

- 6 years, 1 month ago

Go to explore! @Sarthak Rath

- 6 years, 1 month ago

Thank you @Sandeep Bhardwaj Sir for kindly contributing to the logic section!

- 6 years, 1 month ago

@Nihar Mahajan Do you wanna become a Mathematician?

- 6 years, 1 month ago

No I wanna be an Engineer.

- 6 years, 1 month ago

@Sravanth Chebrolu Hey bro! actually the answer to the second question asking for remainder is 46. It is given in my answer key and I solved it too.

- 6 years, 1 month ago

Can you ex plain that?

- 6 years, 1 month ago

The last expression comes as x^2 -13x + 32 = f(x)

- 6 years, 1 month ago

Understood! Dividing it by $(x+1)$ the remainder is, $f(-1):(-1)^2-13(-1)+32 \\ =1+13+32 \\ =\boxed{46}$

- 6 years, 1 month ago

Well, If u get some free time, Please post some problems on Newton's Sums.

- 6 years, 1 month ago

Sure! But recently I am working on Combinatorics, I see to that very soon! I am building a new set don't miss it!

- 6 years, 1 month ago

I will surely try to solve them and also popularize the set!

- 6 years, 1 month ago

Thanks! But, I think I must leave now. See you soon! bye!

- 6 years, 1 month ago

Oh! Yes. Sorry for leading you the wrong way.

The new function is actually, $f(x):x^2-13x+32$! And that when divided by $(x+1)$ leaves $46$.

- 6 years, 1 month ago

No sorry in Friendship! ( if you accept me one)

- 6 years, 1 month ago

Of course! You are by best friend on Brilliant! Who's understood me as perfectly as possible.

- 6 years, 1 month ago

Oh, Thanks! I thought U would get frustrated by my foolishness!

- 6 years, 1 month ago

Never! I am guy of very high patience.

- 6 years, 1 month ago

That is really nice!

- 6 years, 1 month ago

U called me ?

- 6 years, 1 month ago

Yes, pls be my trig teacher and tell me how to start.

- 6 years, 1 month ago

Just read 11th NCERT. It's great.

- 6 years, 1 month ago

Will DAT be enough for both physics and math?

- 6 years, 1 month ago

For physics it would be. But if U mean Problem Solving in Maths then U can practice from brilliant.

P.S - For NSEJS it is enough.

- 6 years, 1 month ago

in which class u r

- 5 years, 9 months ago

9th, Can you hangout me in G+?

- 5 years, 9 months ago

bro, just email me your message... Ok??

- 5 years, 9 months ago

Aahh.. sure. I thought we could discuss Olympiad problems in the brilliant community we have made in g+.

- 5 years, 9 months ago

Thanks , Sir!

- 6 years, 1 month ago

- 6 years, 1 month ago

Haha, well which one do you like? The original pic or the Einstein?

- 6 years, 1 month ago

Of course , Einstein.

- 6 years, 1 month ago

Then I shall change it.

- 6 years, 1 month ago

@Nishant Rai Hello Sir! I just wanted to make a humble request. The standard of the problems you post on Brilliant is really great. I just wanted you to post some kinematics problems on B'ant( without trigonometry, but of high standards). Please take my request into consideration, and please help aspiring physicists like me.

- 6 years, 1 month ago

@Swapnil Das Thanks! give me some time, i will surely post questions related to Kinematics.

- 6 years, 1 month ago

Thank you very much!

- 6 years, 1 month ago

Come on Hangouts

- 6 years, 1 month ago

RD u there! Actually my internet connection has finished and I am on tab, so I will not be able to come before 15th .

- 6 years, 1 month ago

Ohh.... .

- 6 years, 1 month ago

I hope you would not mind talking here.

- 6 years, 1 month ago

not at all . I can surely talk here.

- 6 years, 1 month ago

Thanks, BTW I am learning Trig and Graphs.

- 6 years, 1 month ago

@Nishant Rai pls post the solution to the problems. Thanks!

- 6 years, 1 month ago

@Swapnil Das to all the questions i have posted??

- 6 years, 1 month ago

No Sir, the Kinematics ones up recently posted.

- 6 years, 1 month ago

Not now, but will post after some members posts their solutions. I want to see how other people are attempting the same question.

- 6 years, 1 month ago

@Nishant Rai Hello again, Sir!

Can you please suggest me some reference books for Class 11 Physics?

- 6 years, 1 month ago

After that, do NCERT Exemplar. You can get the pdf's from here . It contain's some very good, high level questions.

If enrolled in some coaching institute, go through their material thoroughly ( Do not jump form one coaching material to some other, they all contain the same thing, except the way they are written).

- 6 years, 1 month ago

I forgot to mention $\text{Concepts of Physics Vol I and II - H. C. Verma}$. Do it to clear and test your conceptual understanding of the subject.

- 6 years, 1 month ago

@Swapnil Das After that, go for $\text{Problems in General Physics - I.E.Irodov}$

- 6 years, 1 month ago

I have already solved from problems from there in class 8.

- 6 years, 1 month ago

@Sravanth Chebrolu Hi! Can you please let me know how are you so good at logic? How can I improve?

- 6 years, 1 month ago

I think you must take suggestions from Nihar or Pi Han Goh sir or Calvin sir or Julian Poon sir etc. . .

They are lot better than me!

- 6 years, 1 month ago

Remember the thoughts,

Imagination is more important than Knowledge. . .

Practice makes man perfect. . .

I think these two thinks did help me a lot! But, honestly, I don't think I am so good

Here are some tips to improve yourself:

• I recommend you to play chess if you would like to improve at logic.(I personally love playing the game!)

• You can practice questions on brilliant! That's the best way to improve yourself.

- 6 years, 1 month ago

Well can we play online chess?

- 6 years, 1 month ago

Ofcourse! Can you provide me the link? But I can't do it today, maybe tomorrow after $5$ PM?

- 6 years, 1 month ago

No, I was just asking if there is an online link for playing chess,..

- 6 years, 1 month ago

I'm sorry, but I don't know any such website? If you find any do inform me! $\huge\ddot\smile$

- 6 years, 1 month ago

Sure!

- 6 years, 1 month ago

Thanks!

- 6 years, 1 month ago

Yes here it (www.chess.com)

- 6 years, 1 month ago

- 6 years, 1 month ago

sorry now check.

- 6 years, 1 month ago

@Sravanth Chebrolu Hey Sravanth, Have you posted any problems on Projectile motion? Can you post some?

- 6 years, 1 month ago

Have U tried mine ? Come on Hangouts

- 6 years, 1 month ago

I can't come on Hangouts for reasons, and yes I have tried your problems, and the alien Projectile problem was just great!

- 6 years, 1 month ago

Have U tried Pizza War 2 ?

- 6 years, 1 month ago

I was mistakened long ago! :(

- 6 years, 1 month ago

I didn't get U.

- 6 years, 1 month ago

I did the problem wrongly long ago, I meant. :(

- 6 years, 1 month ago

Yeah. You can check my set Gravity, but presently I am not working much with physics, if you really want some problems I'll post them soon! $\ddot\smile$

- 6 years, 1 month ago

Thank you!

- 6 years, 1 month ago

Well, @Rajdeep Dhingra does FIITJEE prepare for RMO and NSEJS?

- 6 years, 1 month ago

It makes U prepare for NSEJS but only a little for RMO.

- 6 years, 1 month ago

Then I should join FIITJEE next year itself!

- 6 years, 1 month ago

@Satyajit Mohanty Namaskar , Kemiti Accha?

- 6 years ago

Bhala Achi :D Odia re katha hele non-Odia loka bujhi paribeni :P

- 6 years ago

Na bujhantu , aamar kana jauchi! Aapanankar Ganit kete badhiya! Aapana Rmo re qualify karithile ki?

- 6 years ago

Yeah! In 2013. I was the State Topper Even. I was studying in Rajasthan back then.

- 6 years ago

Oh, so nice to talk to a mathematical prodigy! Can you please advise me for RMO?

- 6 years ago

RMO is very elementary... If you're able to solve Level 4 problems here in Brilliant in Number Theory, Algebra, Geometry, Combinatorics, you'll top RMO :)

- 6 years ago

- 6 years ago

sata re?? kintu mu ta karipareni!! hardly 2-3 solved if i'm lucky.... i've 5 in all u mentioned...still find rmo problems difficult

- 5 years, 10 months ago

Please do post solutions for my Set- Just for Fun!. I love your solutions!

Khang Nguyen Thanh

- 5 years, 11 months ago

- 5 years, 10 months ago

Why dont you come on fb?

- 5 years, 9 months ago

I usually avoid social distraction and adore isolation with mathematics.

- 5 years, 6 months ago

Are you Swapnil or Swaplin? Or wait........ Are you Einstein?

All I know is that you are a high profile physicist. :3

- 5 years, 7 months ago

@Joy Patel Instant action, isn't it?

- 5 years, 7 months ago

How to dethrone a complex cube root of unity from its complexity? This is a stupid short puzzle type made by me.

- 5 years, 6 months ago

by cubing it??

- 5 years, 6 months ago

Correct. :P

- 5 years, 6 months ago

what would happen if we multiply it to zero? would it die!?

- 5 years, 6 months ago

Yes and then @Swapnil Das will arrange its funeral :)

- 5 years, 6 months ago

Lol, but you have to promise to pay the expenses :P

- 5 years, 6 months ago

You are a genius!!

- 6 years, 2 months ago

This is the comment you listen from day to night!

- 6 years, 2 months ago

The most genuine question to start: Do you like Carrots? :P

- 6 years, 2 months ago

Well...., Yes!

- 6 years, 2 months ago

But not too much han! ( No scope to call me a rabbit!)

- 6 years, 2 months ago

Cheers! XD

- 6 years, 2 months ago