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:

New Brilliant Challenge Quizzes

Simple Harmonic Motion: Level 2-3

Simple Harmonic Motion: Level 4-5

Functions: Level 3

Functions: Level 4

Functions: Level 5

2D Coordinate Geometry: Level 3

2D Coordinate Geometry: Level 4

2D Coordinate Geometry: Level 5

Capacitors and Transformers: Level 2-3

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

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.

*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!

## Comments

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

Do you know the secrets behind Harry Potter's lightning scar? ;) – Worranat Pakornrat · 1 year, 1 month ago

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– Hobart Pao · 1 year, 1 month ago

Very creative! (+1)Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

Thanks! Do you read Harry Potter as well? ;)Log in to reply

– Hobart Pao · 1 year, 1 month ago

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

– Worranat Pakornrat · 1 year, 1 month ago

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

P.S: I hope you understand why I used "curious" :P – Sravanth Chebrolu · 1 year, 1 month ago

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– Worranat Pakornrat · 1 year, 1 month ago

Is that the quote from one of the characters? Hm...curious...curious...;)Log in to reply

– Sravanth Chebrolu · 1 year, 1 month ago

Mr. OlivanderLog in to reply

– Worranat Pakornrat · 1 year, 1 month ago

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

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

2D Kinematics: Motion Graphs.

2D Kinematics: Graphs Help Us a Lot.

Similar Polygons: Are you economic with the pizzas?.

Similar Polygons: Are they Similar?.

Magnetic Fields: Find your Poles.

Magnetic Fields: Does it matter?.

Volume of Revolution: Rotate that Function.

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– Sandeep Bhardwaj · 1 year, 1 month 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!Log in to reply

this. – Sravanth Chebrolu · 1 year, 1 month ago

Thanks sir! Here's one more:Log in to reply

Here is a problem on Discrete Probability : Sandeep tosses a coin !.

Look at this problem too on Symmetric Polynomials : Is it really a Symmetry ?. – Anish Harsha · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Very nice problems Anish! Thanks :)Log in to reply

– Anish Harsha · 1 year, 1 month ago

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

Let's Disc, Bros !, on the topic, Volume of Revolution- Calculus. – Anish Harsha · 1 year, 1 month ago

Also, see my new problem,Log in to reply

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

Enjoy! – Worranat Pakornrat · 1 year, 1 month ago

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i have already added.. hope you will like to add. simple harmonic motion level 4 – Aman Rajput · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Interesting, thanks! :)Log in to reply

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! ;) – Worranat Pakornrat · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Congratulations for grabbing 101 followers. Nice problem Dr. Warm. :)Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

Thanks a lot, Sandeep! ;)Log in to reply

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

Enjoy! ;) – Worranat Pakornrat · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Enjoying :)Log in to reply

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

Hope it's not too simple. ;) – Worranat Pakornrat · 1 year, 1 month ago

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– Sravanth Chebrolu · 1 year, 1 month ago

Posted the solution too ;)Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

Saw it. You're so quick! ;)Log in to reply

This will be updated as necessary.

Volume of revolution:

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– Sandeep Bhardwaj · 1 year, 1 month ago

Great great great problems. Thanks!Log in to reply

– Hobart Pao · 1 year, 1 month ago

Thanks!Log in to reply

These are the questions in my stock:

Calculus-Volume of Revolution: Sand of Time.

Combinatorics-Probability: Hit the Jackpot! ; Crispy ABC and Fighting Fish. – Worranat Pakornrat · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

How did you get such an awesome stock? ;)Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

I created it day by day. Gradually they filled up the whole stock. ;)Log in to reply

– Hobart Pao · 1 year, 1 month ago

I saw Sand of Time before...Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

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

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

Recolllect the past 1

Recollect the past 2

Recollect the past 3

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@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! :) – Sandeep Bhardwaj · 1 year, 1 month ago

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– Prakhar Bindal · 1 year, 1 month ago

Thanks a lotLog in to reply

When is the next party coming? – Lee Care Gene · 1 year, 1 month ago

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– Andrew Ellinor · 1 year, 1 month ago

Currently planning a new type of party and redesigning this one :)Log in to reply

My problem on 2D Geometry : Tangents at parabola – Vatsalya Tandon · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

– Vatsalya Tandon · 1 year, 1 month ago

Ok Sir :)Log in to reply

@Sandeep Bhardwaj sir – Prakhar Bindal · 1 year, 1 month ago

From where can i know that my problem has been shortlisted for quizzes or not?Log in to reply

– Sandeep Bhardwaj · 1 year, 1 month 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.Log in to reply

Here is a problem on Discrete Probability – Soumava Pal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Amazing problem. Thanks! :)Log in to reply

– 展豪 張 · 1 year, 1 month ago

Nice extension of a classical problem!Log in to reply

– Soumava Pal · 1 year, 1 month ago

Thanks. :)Log in to reply

Here is next part of my problems on 2d kinematics

Recollect the past 7 ! – Prakhar Bindal · 1 year, 1 month ago

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Here is another of my problems on Similarity. – Soumava Pal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Thanks for the contribution. :)Log in to reply

– Soumava Pal · 1 year, 1 month ago

Thank you, sir!Log in to reply

@Sandeep Bhardwaj sir why am i not able to see ratings of problems only level appears – Prakhar Bindal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month 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. :)Log in to reply

– Prakhar Bindal · 1 year, 1 month ago

okLog in to reply

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

Though its easy, I will be posting some new good problems soon. – Yash Jain · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Good problem. Thanks!Log in to reply

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? – Hjalmar Orellana Soto · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

Volume of Revolution – Hjalmar Orellana Soto · 1 year, 1 month ago

One more forLog in to reply

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

Tricky Triangles – Lee Care Gene · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

The trick is tricky. ;)Log in to reply

Here's my new entry on Calculus-Volume by Revolution: Who ate that apple?. – Worranat Pakornrat · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Yes, Dr. Warm ate it. Anyway, thanks!Log in to reply

– Worranat Pakornrat · 1 year, 1 month ago

Yum! Yum! You're welcome! ;)Log in to reply

Here's my submission:

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– Sandeep Bhardwaj · 1 year, 1 month ago

What a lovely couple of problems! Thanks :)Log in to reply

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– Sandeep Bhardwaj · 1 year, 1 month ago

Great!Log in to reply

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

Good Car, Bad Car – Gian Tuazon · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

Filling up Spheres: This is an old problem, and is not just about solids of revolution. I hope this can do, though. :) – Efren Medallo · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

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

Hint: the solution is also symmetrical. ;) – Worranat Pakornrat · 1 year, 1 month agoLog in to reply

– Sandeep Bhardwaj · 1 year, 1 month ago

Perfect symmetry! ;)Log in to reply

Here Are Some more problems on 2 - D Kinematics

Recollect the past 4 ! Recollect the past 5 ! Recollect the past 6 !

I Request @Sandeep Bhardwaj sir to add these problems too to his previous comment – Prakhar Bindal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Just awesome!Log in to reply

– Prakhar Bindal · 1 year, 1 month ago

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

@Prakhar Bindal – Sandeep Bhardwaj · 1 year, 1 month ago

Brilliant doesn't display the points of a problem anymore. Only the level is displayed. So, enjoy with the level itself. ;)Log in to reply

Here is a problem on Similarity – Soumava Pal · 1 year, 1 month ago

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Before

After

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@Andrew Ellinor

I am redrawing it right away Sir. :D – Soumava Pal · 1 year, 1 month ago

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– Andrew Ellinor · 1 year, 1 month ago

Thanks!Log in to reply

@Andrew Ellinor – Soumava Pal · 1 year, 1 month ago

Is it okay now?Log in to reply

– Andrew Ellinor · 1 year, 1 month ago

Much, MUCH better Soumava. Thanks! Looks great now.Log in to reply

– Soumava Pal · 1 year, 1 month ago

Thank you sir. :)Log in to reply

– Soumava Pal · 1 year, 1 month ago

:)Log in to reply

Here is the set of few computer science problems on Linear Data Structures – Zeeshan Ali · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Very smart set! Thanks :)Log in to reply

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

\(\mathbf{Kinematics}\implies\) Drive Fast ! – Aditya Narayan Sharma · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

– Aditya Narayan Sharma · 1 year, 1 month ago

Hehe thanks sir! . I will be updating more.Log in to reply

Hope you like this one Find out the range! – Abhishek Chopra · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

Here's some problems :- Look at the constant term, Indeed Lengthy !, Will you find the value of roots – Aditya Sky · 1 year, 1 month ago

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@Aditya Sky Your problems are great. Can you post such wonderful problems from the topics selected for this party? – Sandeep Bhardwaj · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month 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 ;)Log in to reply

Here is my entry for Discrete Probability:

Biased Coin

Similar Polygons:

Harry Potter and Sphere – 展豪 張 · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Great, thanks! :)Log in to reply

– 展豪 張 · 1 year, 1 month ago

Are they too easy? ;)Log in to reply

– Sandeep Bhardwaj · 1 year, 1 month ago

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

– 展豪 張 · 1 year, 1 month ago

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

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

Algebra - Government Budget, Mushrooms,Khan the Barber,Financial Gain – Ashwin K · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

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

Here is another problem How many points to qualify? – Abhishek Chopra · 1 year, 1 month ago

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the topics for this week's problem writing party though? – Andrew Ellinor · 1 year, 1 month ago

Great problem Abhishek! Do you have any questions that pertain toLog in to reply

Here's my entry A force of different kind – Neelesh Vij · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

The equation of force is of different kind. Thanks! :)Log in to reply

Symmetric Polynomial

Insanely Huge Symmetric Polynomial – Svatejas Shivakumar · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

haha, great problems. Thanks :)Log in to reply

P.S. great question indeed. – Neelesh Vij · 1 year, 1 month ago

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– Svatejas Shivakumar · 1 year, 1 month ago

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

– Neelesh Vij · 1 year, 1 month ago

Nevermind that, it happens with me also.Log in to reply

– Svatejas Shivakumar · 1 year, 1 month ago

The problem is correct now.Log in to reply

Here is my contribution in 2D Kinematics : Collision in mid-air! – Sahil Bansal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

Great problem! Thanks :)Log in to reply

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

I Will be posting the best of them soon – Prakhar Bindal · 1 year, 1 month ago

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– Sandeep Bhardwaj · 1 year, 1 month ago

That's great! I'm waiting for your nice problems.Log in to reply

– Prakhar Bindal · 1 year, 1 month ago

I Have posted 2 of themLog in to reply

– Sandeep Bhardwaj · 1 year, 1 month ago

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

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

https://brilliant.org/problems/recollect-the-past-3/?ref_id=1156284 – Prakhar Bindal · 1 year, 1 month ago

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

And it will appear as Name of the problem. – Sandeep Bhardwaj · 1 year, 1 month ago

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

Contributed before Dr. Warm. Mission accomplished. – Nihar Mahajan · 1 year, 1 month ago

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@Nihar Mahajan? ;) – Worranat Pakornrat · 1 year, 1 month ago

Oh, no...how could you,Log in to reply

– Sandeep Bhardwaj · 1 year, 1 month ago

Nice problem, Nihar! Thanks :)Log in to reply