*This party is now over. Thanks for your contributions. You can see what we chose by joining the next party!*

Hello Brilliant,

Thanks to you (the members of the community), Brilliant was able to successfully launch two

newquizzes in the past two weeks: Percentages: Level 2-3 and Quadratic Discriminant: Level 1-2.

You may have noticed the recent addition of new **challenge quizzes** to the Brilliant experience. These challenge quizzes are collections of some of the best problems written by the community.

Brilliant has organized many of your problems to cover hundreds of topics on all levels of difficulty, but we are looking to add even more to improve the community experience. We are looking for talented problem writers to create the fun and challenging level 1-2 problems that are missing from these challenge quizzes in Brilliant's inaugural Problem Writing Party.

## How it works

The party starts right now (January 18th, 2016) and will last for the next two weeks. Throughout the two weeks, we will be focusing on writing awesome level 1 and level 2 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:

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

Share links to great relevant problems.

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

**Remember! To be selected, problems you submit should be fun and challenging to a level 1 or level 2 student.**

## Topic Listing

The topics of problem submission for this party are below. Just click the link of the topic for which you want to create a problem.

Algebra - Rational Functions

Geometry - General Polygons

Number Theory - Number Bases

Calculus - Limits of Sequences

Combinatorics - Expected Value

Computer Science - Complexity/Runtime Analysis

Classical Mechanics - Momentum

Thanks!

## Comments

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– Sandeep Bhardwaj · 10 months, 3 weeks ago

Super cool names!Log in to reply

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– Nihar Mahajan · 10 months, 3 weeks ago

Haha , thanks :DLog in to reply

This party is now over. Time to move on to the next one! – Andrew Ellinor · 10 months, 1 week ago

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Hello Sir, I am submitting the following problems for the Party!

Algebra - Intercept of Asymptote

Geometry - Regular Polygons?

Number Theory - Primes in a Prime Base

Calculus - Divide by Prime

Combinatorics - A Peculiar Game

Classical Mechanics - Colliding Spheres

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– Calvin Lin Staff · 10 months, 3 weeks ago

Ohhh, I really like the 2nd one. That's a very common mistake made :)Log in to reply

– Pranshu Gaba · 10 months, 3 weeks ago

A surprising number of people have got it wrong. It seems to be a very common geometry misconception.Log in to reply

@Sandeep Bhardwaj @Andrew Ellinor I enjoyed making the problems. :) – Pranshu Gaba · 10 months, 3 weeks ago

Thank youLog in to reply

@Pranshu Gaba These are awesome! You got one problem in almost every category too. Now that's truly impressive. – Andrew Ellinor · 10 months, 3 weeks ago

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This party is now over. Time to move on to the next one! – Andrew Ellinor · 10 months, 1 week ago

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– Siva Prasad · 10 months, 3 weeks ago

Thanks for these problemsLog in to reply

@Pranshu Gaba for such wonderful set of problems! – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

Well.. keeping in mind Level 1 and Level 2 type of questions I have tried the following ones today:

Algebra - Rational Functions - Restrictions on Domain

Geometry - General Polygons - Area of Polygons

Number Theory - Number Bases - Base 5 or 7 or 9 ?

Calculus - Limits of Sequences - Know your limits !

Combinatorics - Expected Value - How much do you expect ?

Computer Science - Complexity/Run time Analysis - Funny Febo !

Classical Mechanics - Momentum - Angular Momentum

More over I have got two interesting problems regarding

Complexity/Run time Analysisas under:Number of Comparisons (I)

Number of Comparisions (II)

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problem writing party note.

Thanks for your contributions! We picked at least one of these. :) You can see what we chose in the nextThis party is now over. Thanks for your contributions. Time to move on to the next party! – Andrew Ellinor · 10 months, 1 week ago

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@Zeeshan Ali! I liked the second problem in the list i.e. "Area of Polygons" the most. – Sandeep Bhardwaj · 10 months, 3 weeks ago

Thanks for the amazing set of problemsLog in to reply

– Zeeshan Ali · 10 months, 3 weeks ago

thank you very much for your remarks :)Log in to reply

– Calvin Lin Staff · 10 months, 3 weeks ago

Nice calculus double limit, and understanding algorithm questions :)Log in to reply

Here are some more problems on bases -

EDITOne more - Taming the Radix

– Arulx Z · 10 months, 3 weeks agoNote:Majority of them are inspired from AoPS problemsLog in to reply

@Arulx Z for the nice collection of problems. – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

– Arulx Z · 10 months, 2 weeks ago

Thanks a lot! I have added one more.Log in to reply

– Andrew Ellinor · 10 months, 3 weeks ago

Beautiful. I have a good feeling at least one of your problems on bases is going to wind up in a quiz.Log in to reply

– Arulx Z · 10 months, 3 weeks ago

Thanks :)Log in to reply

problem writing party note.

Loved your problems Arulx! We picked one of those problems (maybe two?). You can see what we chose in the nextThis party is now over. Thanks for your contributions. Time to move on to the next party! – Andrew Ellinor · 10 months, 1 week ago

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– Arulx Z · 10 months, 1 week ago

Thanks a lot for selecting my problem :)Log in to reply

Number theory - Big, Bad, Binary – Arjen Vreugdenhil · 10 months, 3 weeks ago

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problem writing party note.

This was indeed a tough problem Arjen, but we were able to make room for it in our Level 3 Number Bases quiz. Thanks for your submission! You can see what we chose in the nextThis party is now over. Thanks for your contributions. Time to move on to the next party! – Andrew Ellinor · 10 months, 1 week ago

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@Arjen Vreugdenhil, Level 4 though! – Sandeep Bhardwaj · 10 months, 3 weeks ago

Nice problemLog in to reply

Should I suggest some of my old problems or I have to post new for the related topics ?@Sandeep Bhardwaj , @Calvin Lin – Chinmay Sangawadekar · 10 months, 3 weeks ago

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You should also try to tweak old examples and craft them into new ones! Old and new problems are fine. :) – Andrew Ellinor · 10 months, 3 weeks ago

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@Andrew Ellinor for responding to Chinmay's query. – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

After the epic weekend wiki party, I thought no other thing could beat it, but I think this will be the one! – Sravanth Chebrolu · 10 months, 3 weeks ago

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problem writing party note.

We picked one of your problems for number bases! You can see what we chose in the nextLog in to reply

– Sravanth Chebrolu · 10 months, 1 week ago

Cool! Thanks a lot!Log in to reply

@Sravanth Chebrolu for nice words. I hope the same. :) – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

Here's my new one for Number Bases - What do these hands mean?. – Worranat Pakornrat · 10 months, 2 weeks ago

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– Margaret Zheng · 10 months, 2 weeks ago

This is a fun one. Just became the first solver!Log in to reply

– Worranat Pakornrat · 10 months, 2 weeks ago

Congratulations! :)Log in to reply

– Margaret Zheng · 10 months, 2 weeks ago

Thanks:)Log in to reply

Hey super intelligent people :DDDDD I am so happy to be in this problem writing party even though I do not have a whole bunch of math skills with me, nor I could think of good problems easily and quickly. So far I got one down Combinatorics, Expected Value - Let's play a game! and I hope it is going to be fine:D – Margaret Zheng · 10 months, 3 weeks ago

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problem writing party note.

Awesome problem Margaret! We picked your problem for our expected value quiz. You can see what we chose in the nextLog in to reply

here Margaret? It looks great! :) – Andrew Ellinor · 10 months, 3 weeks ago

This problemLog in to reply

– Margaret Zheng · 10 months, 3 weeks ago

Thanks for your compliment and I will try to brainstorm some more :)Log in to reply

Algebra decomposition of a rational function

Number Theory Base of Number Bases

Number Theory Forget Base 10

Number Theory Powers of 3 – Kaito Einstein · 10 months, 3 weeks ago

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problem writing party note.

I really enjoyed these. We ended up picking two of them for our number bases quiz! You can see what we chose in the nextLog in to reply

@Kaito Einstein for nice problems. The last one is yummie. – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

– Calvin Lin Staff · 10 months, 3 weeks ago

Oh, i like the number base questions.Log in to reply

Algebra- 1 , 2 , 3Calculus- 1 , 2 , 3Combinatorics- 1 , 2 , 3Geometry- 1 , 2NT- 1 , 2 , 3 . 4Electricity and Magnetism- 1 , 2 , 3Is it okay to add Level 3-4-5 questions ? , or just level 1-2 ? and is the format okay , by using numbers ?

@Sandeep Bhardwaj , @Calvin Lin – Chinmay Sangawadekar · 10 months, 3 weeks ago

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@Chinmay Sangawadekar for the wonderful problems.

ThanksFor this one Problem Writing Party, all the chapters mentioned in the note need level 1-2 problems. Thanks! – Sandeep Bhardwaj · 10 months, 3 weeks ago

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– Chinmay Sangawadekar · 10 months, 3 weeks ago

sure I will post a new set of level 1-2 problemsLog in to reply

– Sandeep Bhardwaj · 10 months, 3 weeks ago

Great! I'm excited. \(\ddot \smile\)Log in to reply

Level 5 warmups. – Calvin Lin Staff · 10 months, 3 weeks ago

It depends on the chapter. Given that these chapters (tend to be) are more basic, we would rather start out with the Level 1, 2 challenge quizzes first, because that is what most people would appreciate, before they delve deeper. Over time, we will be building out the higher level challenge quizzes too. E.g. The Algebra topic has a ton of problems in theLog in to reply

@Calvin Lin also update my solution number and upvotes if possible. – Chinmay Sangawadekar · 10 months, 3 weeks ago

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@Calvin Lin , so is the above set okay ? or I have to post some easy problems of level 1 -2 – Chinmay Sangawadekar · 10 months, 3 weeks ago

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Check out "The Maximum Enneagon". – W Rose · 10 months, 3 weeks ago

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@W Rose. We chose your problem to fit into our General Polygons quiz. I really enjoyed that one!

Thanks a lotThis party is now over. Thanks for your contributions. Time to move on to the next one! – Andrew Ellinor · 10 months, 1 week ago

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– Sandeep Bhardwaj · 10 months, 3 weeks ago

Interesting, thanks!Log in to reply

The Maximum Enneagon – Andrew Ellinor · 10 months, 3 weeks ago

Beautiful. This one is not too difficult and just what we're looking for.Log in to reply

– Calvin Lin Staff · 10 months, 3 weeks ago

That's an interesting problem about polygons :)Log in to reply

These are my contributed problems, sir. Hope you like it

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problem writing party note.

Beautiful, we picked some of your problems for one of our quizzes to be featured on Brilliant forever! You can see what we chose in the nextLog in to reply

– Anish Harsha · 10 months, 1 week ago

Thank you, sirLog in to reply

For the latter 2 problems, can you respond to the reports on them? Thanks! – Calvin Lin Staff · 10 months, 3 weeks ago

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– Anish Harsha · 10 months, 3 weeks ago

I 've deleted the last two problems. But, substituted with another calculus problem.Log in to reply

Here are my questions about polygons:

Weird Land for Sale

Master Lock

Transformer

Save Me!

3 Color Square

Polygon Complex – Worranat Pakornrat · 10 months, 3 weeks ago

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problem writing party note.

Thanks Worranat! We picked some of your problems for the General Polygons quiz. You can see what we chose in the nextLog in to reply

– Worranat Pakornrat · 10 months, 1 week ago

Thank you for choosing my questions. I'm looking forward to writing for the next party! ;)Log in to reply

– Calvin Lin Staff · 10 months, 3 weeks ago

Those are some colorful questions. I think you can clear up the meaning of some of these questions, to make it easier for others to understand. I've reported a few of them, could you help me understand what you're trying to say?Log in to reply

– Worranat Pakornrat · 10 months, 3 weeks ago

Thank you. I've just finished editing them. Hope they're clear this time. ;)Log in to reply

my problems:

– Aareyan Manzoor · 10 months, 3 weeks agoLog in to reply

This party is now over. Thanks for your contributions. Time to move on to the next one! – Andrew Ellinor · 10 months, 1 week ago

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Note that your third link goes to the first problem about primes. Can you fix it? – Calvin Lin Staff · 10 months, 3 weeks ago

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Sir, these are my submissions

Guessing won't help!

How many numbers? – Svatejas Shivakumar · 10 months, 3 weeks ago

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– Calvin Lin Staff · 10 months, 3 weeks ago

Oh wow, I love both problems!Log in to reply

– Svatejas Shivakumar · 10 months, 2 weeks ago

Oops I am sorry I didn't see the topics for the discussion.Log in to reply

Number theory - Problem 1 - Level 2

Number theory - Problem 2 - Level 1

Number theory - Problem 3 - Level 1 – Sachin Vishwakarma · 10 months, 3 weeks ago

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problem writing party note.

We chose one of your number theory problems for the number bases quiz. You can check it out in the nextLog in to reply

@Sachin Vishwakarma for level 1-2 and awesome problems. – Sandeep Bhardwaj · 10 months, 3 weeks ago

ThanksLog in to reply

– Sachin Vishwakarma · 10 months, 3 weeks ago

Welcome sir. :)Log in to reply

– Andrew Ellinor · 10 months, 3 weeks ago

Awesome, I love these!Log in to reply

– Sachin Vishwakarma · 10 months, 3 weeks ago

Thanks. :)Log in to reply

Hello, I'd like to submit my first set of questions:

Geometry - Polygon Complex

Number Theory - 1+1 is no longer 2

More will be coming up! ;) – Worranat Pakornrat · 10 months, 3 weeks ago

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– Calvin Lin Staff · 10 months, 3 weeks ago

Hm, for the second question, I think we should ask for the answer in base 2. Otherwise, it's more about converting into decimal system, then doing the calculation in binary. Thoughts?Log in to reply

Can you subtract binary numbers? – Worranat Pakornrat · 10 months, 3 weeks ago

Oh, OK. I can come up with a new question. Thanks for your advice. ;) Here's the one:Log in to reply

what is the procedure to write a problem ...

should I post the problem in this comment ?? I want to add some concept or examples for level 1-2 as suggested above in the calculus section. – Aman Rajput · 10 months, 3 weeks ago

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Momentum – Rajdeep Dhingra · 10 months, 3 weeks ago

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– Sandeep Bhardwaj · 10 months, 3 weeks ago

Nice problem Rajdeep, thanks!Log in to reply

@Calvin Lin – Rajdeep Dhingra · 10 months, 3 weeks ago

Why has my problem been deleted ?Log in to reply

– Andrew Ellinor · 10 months, 3 weeks ago

I love it. This should definitely be fun for a level 1 or level 2 member.Log in to reply

@Calvin Lin Sorry I didn't see this earlier. I'm working on a contribution right now. – Aditya Rao · 10 months, 2 weeks ago

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– Sandeep Bhardwaj · 10 months, 2 weeks ago

Don't worry you can contribute now too. I'm waiting for your problems. \(\ddot \smile\)Log in to reply

– Zeeshan Ali · 10 months, 2 weeks ago

Hmm! I am waiting... for yours! :DLog in to reply

Tnxs for brilliants ...

God bless you – Atta Mengal · 10 months, 2 weeks ago

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For Combinatorics : Happy Birthday For Calculus : Screw up your brain 1 Screw up your brain 2 – Raven Herd · 10 months, 2 weeks ago

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A new one has come: Combinatorics- Who wants some glass marbles?. – Worranat Pakornrat · 10 months, 3 weeks ago

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Here's a new one in Number Bases: Zodiac 12. – Worranat Pakornrat · 10 months, 3 weeks ago

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Combinatorics - 1. Do you expect this? , 2. Again the same old coins – Anish Harsha · 10 months, 3 weeks ago

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My first one was about Momentum: Caution! Slippery Surface!.

I'll post others later. – Victor Paes Plinio · 10 months, 3 weeks ago

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problem writing party note.

We chose one of your problems for the momentum quiz! You can check it out in the nextLog in to reply

My submission:

Geometry:Equilateral makes it easy – Siddharth Singh · 10 months, 3 weeks ago

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Level 2 problem : Limits of sequence Limit – Aman Rajput · 10 months, 3 weeks ago

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Here's my new one:

Combinatorics- The Big Six – Worranat Pakornrat · 10 months, 3 weeks ago

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Hi sir! Finally I've posted some problems, here they are:

Algebra - horizontal asymptotes

Geometry - Can you determine the sides?

Number Theory - Binary sum?

Calculus - True or false

Classical Mechanics - huge collision

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@Sravanth Chebrolu for the amazing problems. – Sandeep Bhardwaj · 10 months, 3 weeks ago

The best thing about all these problems is that all lie in the region of level 1-2 and all are quite interesting. ThanksLog in to reply

– Sravanth Chebrolu · 10 months, 3 weeks ago

Thanks for conducting this party sir! \(\huge\ddot\smile\)Log in to reply

Classical Mechanics- Momentum – Sahil Bansal · 10 months, 3 weeks ago

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problem writing party note.

We chose one of your problems for the momentum quiz. You can check it out in the nextLog in to reply

– Sahil Bansal · 10 months, 1 week ago

Thank you sir!Log in to reply

Number Theory - Basic Bases, Tricky Factorial.

I am currently working on Number Bases so I'll be posting more of these. – Arulx Z · 10 months, 3 weeks ago

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Edit: I kinda want to pick Tricky Factorial right away. That's a good one. – Andrew Ellinor · 10 months, 3 weeks ago

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Number Bases – Karthik Venkata · 10 months, 3 weeks ago

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problem writing party note.

We chose one of your number theory problems for the number bases quiz. You can check it out in the nextLog in to reply

– Sandeep Bhardwaj · 10 months, 3 weeks ago

Enjoyed the problem Karthik, thanks!Log in to reply