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# Problem Writing Party February 1st - 14th

Hello Brilliant!

Last month's Problem Writing Party was a huge success! So many of you made a contribution one way or another that I couldn't possibly list everyone here. Because of your submissions, we were able to launch not just two new quizzes, but five new quizzes. Here are the quizzes that you all helped create:

New Brilliant Challenge Quizzes
General Polygons: Level 2-3
Number Bases: Level 2
Number Bases: Level 3
Momentum: Level 1-2
Expected Value: Level 2-3

We want to showcase the hard work these members of the community put in over the last week, so Brilliant will featuring these quizzes in the community Featured feed, on Facebook, and in our email campaigns over the next week. With that said, let's kick off the 2nd Problem Writing Party!

## How it Works

The party starts right now (February 1st, 2016) and will last for the next two weeks. Throughout the two weeks, we will be focusing on writing awesome problems for the topics listed below. To participate, submit as many problems as you want to these listed topics. At the end of the party, Brilliant staff will be picking the best 5-10 problems for each topic. These problems will then be immortalized and formed into a challenge quiz. If we pick your problem, then you can brag to your friends because it will be displayed on Brilliant forever!

Use this note to

1. Ask questions about the party or brainstorming ideas from Brilliant staff.

2. Share links to great relevant problems.

3. Bounce your ideas off each other to help formulate the best problem you can.

To be selected, problems you submit should be fun and challenging to a student in the levels listed for the given topic.

## This Party's Topic Listing

The topics of problem submission for this party are below. Just click the topic you want to contribute to.

Geometry - Volume: Level 1-2
Comparing shapes, rearranging 3D figures, playing with volume formulae. Pictures preferred.

Number Theory - Quadratic Residues: Level 3-4
Legendre Symbol, Law of Quadratic Reciprocity, Problem solving, etc.

Combinatorics - Data Presentation: Level 1-2
Data plots, graphs, charts, and misrepresented data.

Classical Mechanics - Conservation of Energy: Level 2-4
Problems that rely on conserving energy from one state to another.

We didn't receive enough problems in these categories last party, so we're asking for your contributions in them again and we've loosened the constraints so that more submissions come in.

Algebra - Rational Functions: Level 1-3

Computer Science - Complexity/Runtime Analysis: All levels

Happy writing and party on!

Note by Andrew Ellinor
2 years ago

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1. numbered2. list
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[example link](https://brilliant.org)example link
> This is a quote
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    # I indented these lines
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print "hello world"
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# 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:

Here are my questions about Geometry-Volume:

Bar, Ball, Cone

Who wants a scoop?

Pyramid VS Pyramid

5 Pyramids in 1 Cube

Hope you enjoy them! ;)

- 2 years ago

I like your last two problems

- 2 years ago

Thank you. Hope more will come. ;)

- 2 years ago

Yo got that for sure bro!

- 2 years ago

Can I invite my friend @John Michael Gogola ? He wants to join.

- 2 years ago

Absolutely!

- 2 years ago

Why not

- 2 years ago

Thanks :)

- 2 years ago

Check out my problems :
Geometry : Volume Comparison
Classical Mechanics : Mass- Spring System
Number Theory : No Residue

- 2 years ago

Looking good, Anish! I think we might pick a few of your problems again.

- 2 years ago

Thanks, sir !

- 2 years ago

- 2 years ago

Haha , nice! :P

- 2 years ago

Inspired by You

- 2 years ago

- 2 years ago

More calculus problems for the limits category:

- 2 years ago

I like the title for the second one! haha but out of those three, I especially enjoyed "Almost pizza." It might be kind of difficult for level 1, but oh well...

- 2 years ago

A new one on Geometry-Volume again: Crystal Clear.

- 2 years ago

This is my new question about Geometry-Volume: Crystal in a Cube

Enjoy! ;)

- 2 years ago

I just want to ask, why geometry only volume.

I got some difficult geometry but it's 2D

Why must 3D, you said you didn't receive enough problem

- 2 years ago

I am submitting this set of problems for the party :)

- 2 years ago

I have just posted my very first calculus problem: Where does it go? It is an easy but great concept for the beginners (like me).

- 2 years ago

I've got another problem: Rational? Real! for rational functions -algebra. Hope you enjoy!

- 2 years ago

I like it! Definitely a fun problem. We'll probably put it into rational numbers though. Rational functions on the other hand are a polynomial divided by a polynomial, such as

$\frac{1}{2x^2 - 5x - 3}, \frac{x^3 - 7x + 6}{x^3 + 6x^2 + 11x + 6}, \frac{3x + 6}{x^2 - 1}$

Fun, right? We'll find a home for this one somewhere. I definitely like Milky and Tricky!

- 2 years ago

Here is my problem MOMENTUM

- 2 years ago

Indeed, Rajdeep is correct. The momentum quiz has already been made. But we can possibly find another home for it!

- 2 years ago

- 2 years ago

Another rational function problem--true story. I think it's easy enough for level 1.

- 2 years ago

My fourth problem.

- 2 years ago

This is the question about Calculus-Limits of Functions: Line, Point, Curve.

Probably too easy, but it's level 1, which we needed. So let's give it a try! ;)

- 2 years ago

Perfect! We need level 1 problems like this. Thanks Dr. Warm.

- 2 years ago

You're very welcome, Andrew. ;)

- 2 years ago

Here are two problems for limits of functions:

(I deleted my laser beam problem. Plus, it kept getting marked as "geometry," even though I assure you that NO geometry is needed to solve it. Oh well; it is kind of messy.)

- 2 years ago

Fun problems! I think one of this will land in a new challenge quiz. ;)

- 2 years ago

Thank you! That would be great. :) Here's another limits one that I came up with. It requires just a little more tact: 4, 3, 2, 1, Earth below us

- 2 years ago

That's explain why I can't see ur post anymore

- 2 years ago

Yes; I deleted it. That's maybe why you had trouble with it as well. Try it out now, if you'd like (and my other problems as well :D).

I really liked your problem, btw. I feel like it should be on a quiz.

- 2 years ago

Why doesn't any one come up with any Computer Science questions.!? :P

- 2 years ago

I think because its not known to many people

eg: me

- 2 years ago

Same here, idk what is computer science

- 2 years ago

I think because the others is more interesting that Computer Science

- 2 years ago

Well.... I don't think so... there are so many hidden genius people with a brilliant mind of computer science (like me of course :) ) here on brilliant.org :P they just need to come up with some new ideas ..!

- 2 years ago

This is my new one for Combinatorics-Data Presentation: Roses are red. Violets are blue..

I hope it's not too easy. ;)

- 2 years ago

God made me pretty , what happened to you? ;) A good problem!

- 2 years ago

Thanks. Did you solve it yet?

- 2 years ago

My second problem, RATIONAL FUNCTION

- 2 years ago

I like it Jason! This is more Functional Equations. Rational functions deal specifically with a polynomial in the numerator and a polynomial in the denominator, so keep at it.

- 2 years ago

Thx my Friend

- 2 years ago

Comment deleted Feb 10, 2016

Great problem, I like it

- 2 years ago

Thank you! I hope that it's not too difficult for level 2 or 3.

- 2 years ago

ok I gave up with your problem

it's a little difficult to a level 2

- 2 years ago

Yes, it might be a level 3, but it's definitely not a level 4 problem. What's giving you trouble?

- 2 years ago

It's a level 3 problem right now but it might go up to level 4. It's computationally cumbersome.

- 2 years ago

i'm not good at calculus, I need to find Rational Function that not using calculus, but using algebra

i'm going to post my algebra rational function

( I fail with your problem )

- 2 years ago

It's ok, don't worry. I will try out your problem when you post it!

- 2 years ago

i'm still level 2 function

- 2 years ago

did you solve it? Your name has not appeared yet under solvers. I'm sure you could, since all one needs is Pre-Calculus knowledge to solve it

- 2 years ago

i'm not a pro calculus

- 2 years ago

Well, the only calculus knowledge you'll need to know is the first derivative test. I learned that in my Pre-Calculus class two years ago.

- 2 years ago

i'm a level 1 calculus ( I have never learned calculus before )

- 2 years ago

i even haven't master sin and cosinus

- 2 years ago

don't worry, it's difficult to learn calculus on your own

- 2 years ago

Anyway, check my Rational Function problem !!!

No calculus need, but algebra does

- 2 years ago

Nice problem.

- 2 years ago

thx mate

- 2 years ago

My third problem.

- 2 years ago

Here's a new one on Calculus-Limits of Functions: 1, 2, 3 Again.

- 2 years ago

Here are my new problems about Algebra-Rational functions:

1, 2, 3, Go!

So close yet so far

Have fun! ;)

- 2 years ago

Geometry- Volume : Thick Trick

- 2 years ago

I have worked out some problems regarding Complexity/Runtime Analysis, here are they:

I will try to provide problems related to other topics later, Insha.Allah..

- 2 years ago

These are PERFECT! Thanks Zeeshan.

- 2 years ago

Bingo! Here comes another one ...

- 2 years ago

You are welcome :)

- 2 years ago

My second question here.

- 2 years ago

- 2 years ago

I just posted a Geometry-Volume problem the "Un-Uniform Sphere". It's maybe a 3 but not a 1!

- 2 years ago

Thanks @W Rose! I'll have a look at it and see if I can find it a home.

Also, you can post links to your problems using the following format
[Un-Uniform Sphere](https://brilliant.org/problems/un-uniform-sphere/)

Like this: Un-Uniform Sphere

- 2 years ago

Here is another geometry/volume problem. Perhaps too hard for level 2, but I'll post it anyway:

- 2 years ago

Oh I think we can find a home for this problem. Your big, bad, binary was hard for the level 3 challenge quiz but we put it in anyway ;)

Thanks Arjen! These are great.

- 2 years ago

My problems on Volume:-

Hollow Cone

How much time to fill?

Will try to add more questions.

- 2 years ago

Beautiful. Thanks, Vighnesh. We might have to make a level 1 and a level 2 challenge quiz for Volume to fit all these questions in.

- 2 years ago

Another problem on Volume by me: Open Box Volume

- 2 years ago

Check my simple , learning and conceptual problems of conservation of energy.

My Set Energy Tranfers .

- 2 years ago

Ohhhh yeah. Some of these will do just fine in the energy quiz. Perfect, Yash.

- 2 years ago

- 2 years ago

Looks great John! I'm not quite sure which of the chapters it will fit in (out of the chapters listed in the note above), but this might be good for a Euler's Theorem quiz later down the road.

- 2 years ago

I just wrote a funny and easy problem for Geometry- volume: Milky & Tricky Is this good?

- 2 years ago

I love it

- 2 years ago

Thanks!

- 2 years ago

Tricky is right! I like it. This might be our hard level 2 problem. We have so many volume questions pouring in, so this is great!

- 2 years ago

Thanks and I will work hard!

- 2 years ago

Here's my questions about Party's Topic Listing

Geometry- Volume : Archimedes Formula

Geometry- Volume : Thick Trick

Algebra- Rational Function : Rational Function

- 2 years ago

Hey Brian. In order to get your problem to show up as a link, use the formatting [Archimedes Formula](https://brilliant.org/problems/archimedes-formula/), you can achieve a link like this:

- 2 years ago

Thanks for the info Sir Andrew.

- 2 years ago

Calculus - Limits

- 2 years ago

Thanks Sahil! Funny how people can get away without even noticing the floor :P

- 2 years ago

My first problem in this party.

- 2 years ago

Haha, what a perfect answer too!

- 2 years ago

Check my geometry problem

- 2 years ago

Beautiful image. Looks like a prime candidate for a challenge quiz. ;)

- 2 years ago

Here are mine:

Geometry: Divine Conedy

Classical Mechanics: Bob Goes Faster

- 2 years ago

Here is a rational functions problem I just submitted.

- 2 years ago

Appreciated Denton! We were severely lacking in the rational functions category, so your contribution is greatly appreciated. Expect to see your problem in a challenge quiz in a week. ;)

- 2 years ago

And here it is:

- 2 years ago

Awesome! I'll go create another one in the same category, then.

- 2 years ago

This is what I have so far--there may be more coming.

Calculus--limits of fxns:

Algebra--rat'l fxns:

- 2 years ago

"Too much calculus may put you in the L'Hopital" is the funniest title I've read in a long, long time. Too bad challenge quizzes don't show the title! :P

- 2 years ago

Computer Science: Do you know your sorting?

@Andrew Ellinor I'm not sure if my problem Confusing Collisions satisfies the above criteria of level 2-4 because it's a very challenging problem, but still I hope there's no harm in submitting.

There's definitely no harm in submitting! Submit as many problems as you would like. This one looks challenging :)

- 2 years ago

Nice prob

- 2 years ago

Volume - Problem 1 No submission due to practicals.

- 2 years ago

Can anyone tell me , if I increase a number(say x) by 9 times, the resultant would be 9x or 10x?????

- 2 years ago