# Problem Writing Party: March 28th - April 10th

Hello Brilliant!

Once more, Problem Writing Party number 5 was a record breaking success: this time we made nine new quizzes! Here are the quizzes that you all helped create:

We're going to show off all the hard work these members of the community put in over the last week. Continue submitting your fantastic problems as we kick off our sixth Problem Writing Party!

## How it Works

The party starts right now (March 28th, 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 in quizzes that need your help on the publish page.

To join, 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! Your problem has a better chance of being selected if you include a graphic (when appropriate) and a solution.

## 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 levels 1-3 for the given topic.

## -------->This Party's Topic Listing<--------

The topics of problem submission for this party can be found by navigating over to the Brilliant publish page and checking under the quizzes that need your help section. Just click the contribute button next to the topic you want to make a submission to.

Happy writing and keep the party alive!

Note by Andrew Ellinor
4 years, 6 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.
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Note: you must add a full line of space before and after lists for them to show up correctly
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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} $a_{i-1}$
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\sqrt{2} $\sqrt{2}$
\sum_{i=1}^3 $\sum_{i=1}^3$
\sin \theta $\sin \theta$
\boxed{123} $\boxed{123}$

Sort by:

Here's my freshly made problem on Geometry-Similar Polygon: The Lightning Scar.

Do you know the secrets behind Harry Potter's lightning scar? ;)

- 4 years, 6 months ago

Very creative! (+1)

- 4 years, 6 months ago

Thanks! Do you read Harry Potter as well? ;)

- 4 years, 6 months ago

A long time ago! I used to be obsessed with it.

- 4 years, 6 months ago

Well, then this is the chance for you to find the last and the most powerful Hallow. Lol...

- 4 years, 6 months ago

Oh my god, The fourth Hallow! Curious, curious . . . .

P.S: I hope you understand why I used "curious" :P

- 4 years, 6 months ago

Is that the quote from one of the characters? Hm...curious...curious...;)

- 4 years, 6 months ago

Mr. Olivander

- 4 years, 6 months ago

Ah...I see but he already played his part in the Elder Wand already. Now we're looking for the spear wielder. LOL...

- 4 years, 6 months ago

Here is a problem on Discrete Probability : Sandeep tosses a coin !.
Look at this problem too on Symmetric Polynomials : Is it really a Symmetry ?.

- 4 years, 6 months ago

Very nice problems Anish! Thanks :)

- 4 years, 6 months ago

Thanks, sir. I dedicate the 1st problem to you ! :)

- 4 years, 6 months ago

Also, see my new problem, Let's Disc, Bros !, on the topic, Volume of Revolution- Calculus.

- 4 years, 6 months ago

This is my contribution for this party, will be posting more, hope it helps!

- 4 years, 6 months ago

All the problems are wonderful. It seems that every problem is capable of making its way to the quiz. Thanks Sravanth for such great problems!

- 4 years, 6 months ago

Thanks sir! Here's one more: this.

- 4 years, 6 months ago

Here are some problems by Prakhar Bindal on 2D Kinematics:

- 4 years, 6 months ago

@Prakhar Bindal I've collected your problems in my comment. And you can check out the latex syntax to add the link of a problem here in the comments. Thanks for the nice problems! :)

- 4 years, 6 months ago

Thanks a lot

- 4 years, 6 months ago

These are the questions in my stock:

Calculus-Volume of Revolution: Sand of Time.

Combinatorics-Probability: Hit the Jackpot! ; Crispy ABC and Fighting Fish.

- 4 years, 6 months ago

How did you get such an awesome stock? ;)

- 4 years, 6 months ago

I created it day by day. Gradually they filled up the whole stock. ;)

- 4 years, 6 months ago

I saw Sand of Time before...

- 4 years, 6 months ago

Oh, really? I thought it'd fit the topic, so I put it here.

- 4 years, 6 months ago

This will be updated as necessary.

Volume of revolution:

- 4 years, 6 months ago

Great great great problems. Thanks!

- 4 years, 6 months ago

Thanks!

- 4 years, 6 months ago

This is my new question on Geometry-Similar Polygons: Half, Half, Half.

Hope it's not too simple. ;)

- 4 years, 6 months ago

Posted the solution too ;)

- 4 years, 6 months ago

Saw it. You're so quick! ;)

- 4 years, 6 months ago

This is my new question on Algebra-Symmetrical Polynomial: Prime, Prime, Prime.

Enjoy! ;)

- 4 years, 6 months ago

Enjoying :)

- 4 years, 6 months ago

For the special event of my 101 followers, I present my new question on Geometry-Similar Polygons: 101 Followers Question by Dr. Warm.

Hope you guys would like it! ;)

- 4 years, 6 months ago

Congratulations for grabbing 101 followers. Nice problem Dr. Warm. :)

- 4 years, 6 months ago

Thanks a lot, Sandeep! ;)

- 4 years, 6 months ago

- 4 years, 6 months ago

Interesting, thanks! :)

- 4 years, 6 months ago

As for the final day of this party, I present to you, Algebra-Symmetrical Polynomials: Inverse of Inverses.

Enjoy!

- 4 years, 6 months ago

Here comes my first one: Andlew's three symmetric numbers

Contributed before Dr. Warm. Mission accomplished.

- 4 years, 6 months ago

Oh, no...how could you, @Nihar Mahajan? ;)

- 4 years, 6 months ago

Nice problem, Nihar! Thanks :)

- 4 years, 6 months ago

I Have a hell lot of nice problem of 2D Kinematics (Atleast 100).

I Will be posting the best of them soon

- 4 years, 6 months ago

That's great! I'm waiting for your nice problems.

- 4 years, 6 months ago

I Have posted 2 of them

- 4 years, 6 months ago

You can post the links of the problems you post here in the comment box. Thanks! :)

- 4 years, 6 months ago

https://brilliant.org/problems/recollect-the-past-1/?ref_id=1156248

https://brilliant.org/problems/recollect-the-past-2/?ref_id=1156260

https://brilliant.org/problems/recollect-the-past-3/?ref_id=1156284

- 4 years, 6 months ago

$\text{[Name of the problem](link)}$

And it will appear as Name of the problem.

- 4 years, 6 months ago

Here is my contribution in 2D Kinematics : Collision in mid-air!

- 4 years, 6 months ago

Great problem! Thanks :)

- 4 years, 6 months ago

- 4 years, 6 months ago

Can you please post the solution for second part as for some reasons my answer is not matching.

P.S. great question indeed.

- 4 years, 6 months ago

Actually I did a mistake in my calculation and the answer to the second part is wrong. Extremely sorry.

- 4 years, 6 months ago

Nevermind that, it happens with me also.

- 4 years, 6 months ago

The problem is correct now.

- 4 years, 6 months ago

haha, great problems. Thanks :)

- 4 years, 6 months ago

Here's my entry A force of different kind

- 4 years, 6 months ago

The equation of force is of different kind. Thanks! :)

- 4 years, 6 months ago

Here is another problem How many points to qualify?

- 4 years, 6 months ago

Great problem Abhishek! Do you have any questions that pertain to the topics for this week's problem writing party though?

- 4 years, 6 months ago

Guys..Try out these questions in my stock with solutions. I did not get proper responses.

- 4 years, 6 months ago

Problems are nice but quite apart from the topics of the party. Well, thanks and waiting for the party problems. :)

- 4 years, 6 months ago

Here is my entry for Discrete Probability:
Biased Coin
Similar Polygons:
Harry Potter and Sphere

- 4 years, 6 months ago

Great, thanks! :)

- 4 years, 6 months ago

Are they too easy? ;)

- 4 years, 6 months ago

Not too easy. The problems are of intermediate level I guess. :) Keep it up!

- 4 years, 6 months ago

I will work hard to create some harder problems(maybe level 5) ;)

- 4 years, 6 months ago

A colorful set of problems. It would be great if you could post such amazing problems from the topics selected for this party. Thanks ;)

- 4 years, 6 months ago

@Aditya Sky Your problems are great. Can you post such wonderful problems from the topics selected for this party?

- 4 years, 6 months ago

Hope you like this one Find out the range!

- 4 years, 6 months ago

Looks difficult to me. BTW nice one. Thanks! ;)

- 4 years, 6 months ago

Here's my submission to the party . I will post more soon.

$\mathbf{Kinematics}\implies$ Drive Fast !

- 4 years, 6 months ago

Nice problem. Drive fast, but don't cross the limit. ;) Thanks!

- 4 years, 6 months ago

Hehe thanks sir! . I will be updating more.

- 4 years, 6 months ago

Here is the set of few computer science problems on Linear Data Structures

- 4 years, 6 months ago

Very smart set! Thanks :)

- 4 years, 6 months ago

Here is a problem on Similarity

- 4 years, 6 months ago

Great problem Soumava! I recommend redrawing your graphic though. The numbers are a little too small to read and they'll be even smaller if added to a quiz. Moreover, be smart about your canvas size. Make sure your graphic fills up the entire canvas instead of leaving white space around the edges. See the difference below:

Before

After

- 4 years, 6 months ago

I am redrawing it right away Sir. :D

- 4 years, 6 months ago

Thanks!

- 4 years, 6 months ago

:)

- 4 years, 6 months ago

Is it okay now? @Andrew Ellinor

- 4 years, 6 months ago

Much, MUCH better Soumava. Thanks! Looks great now.

- 4 years, 6 months ago

Thank you sir. :)

- 4 years, 6 months ago

Here Are Some more problems on 2 - D Kinematics

I Request @Sandeep Bhardwaj sir to add these problems too to his previous comment

- 4 years, 6 months ago

Just awesome!

- 4 years, 6 months ago

sir i am not able to see points a problem corresponds to only the level of problem is visible . can you help?

- 4 years, 6 months ago

Brilliant doesn't display the points of a problem anymore. Only the level is displayed. So, enjoy with the level itself. ;) @Prakhar Bindal

- 4 years, 6 months ago

Now it's time for Algebra-Symmetrical Polynomials: Squares In Between.

Hint: the solution is also symmetrical. ;)

- 4 years, 6 months ago

Perfect symmetry! ;)

- 4 years, 6 months ago

Filling up Spheres: This is an old problem, and is not just about solids of revolution. I hope this can do, though. :)

- 4 years, 6 months ago

There should be a fish in the tank. Nice problem, thanks! ;)

- 4 years, 6 months ago

Maybe this old problem of mine would be useful for discrete probability:

- 4 years, 6 months ago

The car in the image is definitely a bad car. But the problem is good. ;) Thanks!

- 4 years, 6 months ago

Here's my submission:

- 4 years, 6 months ago

What a lovely couple of problems! Thanks :)

- 4 years, 6 months ago

Thank you! I have made two more problems:

- 4 years, 6 months ago

Great!

- 4 years, 6 months ago

Here's my new entry on Calculus-Volume by Revolution: Who ate that apple?.

- 4 years, 6 months ago

Yes, Dr. Warm ate it. Anyway, thanks!

- 4 years, 6 months ago

Yum! Yum! You're welcome! ;)

- 4 years, 6 months ago

Been some time since I last posted a question. Anyway, here is a question for similar polygons.

- 4 years, 6 months ago

The trick is tricky. ;)

- 4 years, 6 months ago

Here are three problems for Similar Polygon Geometry: It may be Hard to Notice, Not Hard to Imagine and Can you Solve this Without Trig?

- 4 years, 6 months ago

Amazing problems. I liked 3rd one the most. Thanks! Keep posting ;)

- 4 years, 6 months ago

One more for Volume of Revolution

- 4 years, 6 months ago

Here is my first contribution for Discrete Probability:How many balls?

Though its easy, I will be posting some new good problems soon.

- 4 years, 6 months ago

Good problem. Thanks!

- 4 years, 6 months ago

Here is another of my problems on Similarity.

- 4 years, 6 months ago

Thanks for the contribution. :)

- 4 years, 6 months ago

@Sandeep Bhardwaj sir why am i not able to see ratings of problems only level appears

- 4 years, 6 months ago

Because no one can see the ratings now. Brilliant doesn't display the ratings anymore. Only level appears for a problem. Enjoy with that. :)

- 4 years, 6 months ago

ok

- 4 years, 6 months ago

Thank you, sir!

- 4 years, 6 months ago

Here is next part of my problems on 2d kinematics

- 4 years, 6 months ago

Here is a problem on Discrete Probability

- 4 years, 6 months ago

Nice extension of a classical problem!

- 4 years, 6 months ago

Thanks. :)

- 4 years, 6 months ago

Amazing problem. Thanks! :)

- 4 years, 6 months ago

My problem on 2D Geometry : Tangents at parabola

- 4 years, 6 months ago

Great! Thanks for the contribution. However, this party has been over, you can participate in the upcoming parties. :)

- 4 years, 6 months ago

From where can i know that my problem has been shortlisted for quizzes or not? @Sandeep Bhardwaj sir

- 4 years, 6 months ago

You can click on the quizzes mentioned in the note and check out whether your problem has been selected. Remember that the mentioned quizzes are from the previous problem writing party.

- 4 years, 6 months ago

Ok Sir :)

- 4 years, 6 months ago

When is the next party coming?

- 4 years, 6 months ago

Currently planning a new type of party and redesigning this one :)

- 4 years, 6 months ago