Hello Brilliant!

Brilliant's second Problem Writing Party was an even bigger success than the first. Thanks to all the contributions from Worranat, Brian, Anish, Arjen, Rajdeep, Nihar, Hobart, Jason, Pranshu, Margaret, Akshay, Lee, Jonas, Zeeshan, W Rose, Vignesh, Yash, John Michael, Sahil, Denton, Ishan, Sachin, and the countless others of you who helped!

This week, we were able to create a record-setting **six** new quizzes. Here are the quizzes that you all helped create:

New Brilliant Challenge Quizzes

Rational Functions: Level 2-3

Volume: Level 1

Volume: Level 2

Conservation of Energy: Level 2

Complexity / Runtime Analysis: Level 3

Limits of Functions: Level 1-2

As always, we're going to continue showing off the hard work these members of the community put in over the last week, so Brilliant will featuring these quizzes in **topic listings and social media**. Now that those announcements have been made, we're moving on to our *third* Problem Writing Party!

The party starts right now (February 15th, 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!

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.*

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 make a submission to.

Happy writing and continue to party on!

No vote yet

1 vote

Easy Math Editor

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:

`*italics*`

or`_italics_`

italics`**bold**`

or`__bold__`

boldNote: you must add a full line of space before and after lists for them to show up correctlyparagraph 1

paragraph 2

`[example link](https://brilliant.org)`

`> This is a quote`

Remember to wrap math in`\(`

...`\)`

or`\[`

...`\]`

to ensure proper formatting.`2 \times 3`

`2^{34}`

`a_{i-1}`

`\frac{2}{3}`

`\sqrt{2}`

`\sum_{i=1}^3`

`\sin \theta`

`\boxed{123}`

## Comments

Sort by:

TopNewestMore problems:

Mechanics - Rotational Kinetic Energy

Calculus of Parametric Equations:

Second Derivative

Area

Arc Length

Surface Area

Volume

And this is the complete set of problems that I submitted for the 3rd party: My Problems

Log in to reply

This is my question on Geometry-Surface Area: Speak Louder.

Hope it's not too complicated. ;)

Log in to reply

This is a bit off the beaten path, but it involves Calculus of parametrized curves: Tangential Curve.

(More or less the same problem is Tangential Network #1, but it does not explicitly refer to parametrized curves. Even cooler is Tangential Network #2, but no parameters there, either.)

Log in to reply

This is my easy one on Combinatorics-Data Presentation: Shall we go shopping?.

Probably too easy though. ;)

Log in to reply

My fifth surface area question.

Quite A Long Way Up

Log in to reply

Another new one on Combinatorics-Data Presentation: Fruit Lovers.

What is your favorite fruit? ;)

Log in to reply

My new question on Geometry-Surface Area has come: Pyramidal Mystery.

Enjoy! ;)

Log in to reply

$\text{Another surface area problem :}$ Ratio of surface areas

Log in to reply

Another new one of mine on Geometry-Surface Area: Colorful Prisms.

Enjoy! ;)

Log in to reply

My question on Calculus-Parametric Equations is here: Time Zero.

Do you know what happens at the dawn of time?

Log in to reply

Once there were cubes and spheres, a problem for surface area. :)

Log in to reply

Thanks Efren! I'd be careful though. You might need to edit your problem statement. You said the answer takes the form (A/B)^n, but (1/2)^3 and (1/8)^1 are of the same form, are they not?

Log in to reply

Oops. You're right. My bad!

Log in to reply

3.14159geon 1

3.14159geon 2

Log in to reply

My fourth surface area question.

Ground Into Atoms

Log in to reply

Here are my entries.....

Geometry.

Electric Resistors.

Human Resistance.

Nice Party..........Enjoyed many sums....

Log in to reply

Great questions! I especially like your resistor entries.

Log in to reply

Thanks Sir!! I am glad that you liked those..............

Log in to reply

Here's my easy new question on Geometry-Surface Area: Blue or Red.

It's quite illusive actually. ;)

Log in to reply

Haha, wouldn't have expected that as the answer.

Log in to reply

Yeah, that's what I thought, too. Look can be deceptive.

Log in to reply

Hi @Andrew Ellinor, Here is my set of problems: (I will edit this and include 6 problems finally) Do check them out and let me know your views on them,

Numerical Methods

Inequality

Log in to reply

I like the Soumava's algorithm question! I think we'll end up using that one because we don't have many root approximation questions. However, the inequality problem you submitted doesn't involve any logarithms! :P

Log in to reply

Thanks a lot, @Andrew Ellinor Sir.

P.S. I will add a few more questions I reckon.

P.P.S. I submitted the inequality problem for Algebra. Was is necessary btw to make it a logarithmic inequality? I will post one too, in that case.

Log in to reply

publish page.

Yep. You can see what topics we need on theLog in to reply

got another problem in geometry, surface area - how much paint do you need?

Log in to reply

Thanks Margaret! Don't forget, you can always use the formatting

`[How much paint do you need?](https://brilliant.org/problems/how-much-paint-do-you-need/)`

so that your link appears like this:How much paint do you need?

Log in to reply

That is very helpful. Thank you very much@Andrew Ellinor and I will do so for the rest of my problems.

Log in to reply

How about February 29 though? It's a leap year this year...

Log in to reply

I agree hahaha

Log in to reply

Root Approximation: Do you know Soumava's algorithm?

Log in to reply

My third surface area question.

Cube Sliced In Half

Log in to reply

Too many twos

What's with these logs

Log in to reply

Cool problems !! @Vighnesh Shenoy

Log in to reply

Thanks!

Log in to reply

Hi! @Andrew Ellinor i missed the last party but i really want to contribute to this one so here's a problem involving resistors. Resistors tend to infinty please try this problem and tell me your views about it $:)$

Log in to reply

Hi Racchit, thanks for your problem! I think the problem is great (infinite resistors are always fascinating). I might recommend trying to have only

onetrue statement so that you can put your question in multiple choice format next time. Currently it's just a little hard to read. ;)Log in to reply

thanks for the advice :)

Log in to reply

Log in to reply

Here is the question on Logarithmic inequalities.

Log in to reply

Excellent Rishik! This question is perfect for the level 1-2 quiz we're trying to create.

Log in to reply

My second surface area question.

Turning Cuboids Into A Cube

Log in to reply

Awesome Surface Area problems....

Log in to reply

Thanks! I'll make more in the future.

Log in to reply

Log in to reply

More problems!

Root Approximation - Quintic Pi Polynomial

Logarithmic Inequalities - Tens everywhere

Log in to reply

Those coefficients are delightful. Definitely makes the problem fun to try! :)

Not sure why the logarithmic inequality problem is proving to be so hard but people love it!

Log in to reply

Andrew likes Resistors

Log in to reply

You're right, I do like resistors -w-w-

Log in to reply

My new resistor problem : Can't Resist.

Log in to reply

Sorry I couldn't participate in the second problem writing party due to exams. Now that they are over, I can finally participate in this party :) Here is an easy problem to start with.

Log in to reply

Thanks Svatejas! I hope you continue participating in this party and future parties.

Log in to reply

Here are two more problems:

Surface Area - Surface Area of a Molecule

Data Presentation - Where have the Jelly Beans gone?

And here's one from the last party:

Data Presentation - Jon's Hypothesis

Log in to reply

For rotational kinetic energy:

Slide, Hook, Roll (an older problem)

Flywheel

Square it away

Log in to reply

Here's a yummy question on Geometry-Surface Area: Some Orange?.

Feel free to taste it. ;P

Log in to reply

A palatable question indeed.

Log in to reply

Thanks. I got the idea when I saw oranges in the mall. Lol...

Log in to reply

Resistors: Cantor Equivalent

Surface Area: Dimples

Log in to reply

Here is my entry (at last)

Log in to reply

Here is my Surface Area problem, I will come up for another ASAP

Square and Triangle

Log in to reply

For resistors..

Is this simple ratio and proportion?

On bridges

Log in to reply

Another surface area (may be too easy?)

Find the box tops

Log in to reply

No such thing as too easy! I'll make sure it finds a home.

Log in to reply

Thanks! I appreciate it.

Log in to reply

This is my new one on Algebra-Logarithm Inequality: Tricky Quadratic Logarithm.

Surely you won't need your calculator if you can spot a trick in this one. ;)

Log in to reply

Ahhh, I spot the trick. I'll keep it a secret though. ;)

Log in to reply

Oh, you already saw it. This is what math problem in Thai class looks like. Not a piece of cake, right? ;)

Log in to reply

For surface area:

This isn't rocket science, it's rocket math!

Log in to reply

Ohh yeah, this is a winner. Very creative.

Log in to reply

This is my new problem on Combinatorics-Data Presentation: Have you got health insurance?

It's kind of mixture of basic statistics, too. Suits for anyone who's interested in insurance company. ;)

Log in to reply

Nice! I was hoping we could finally create the data presentation quiz. I'm afraid some people find it boring, but you definitely know how to make it fun with these kinds of problems.

Log in to reply

Thanks. It was kind of difficult to make an easy problem fun to play with, but glad you like it. ;)

Log in to reply

Hello,nice to see such great events taking place in the community.I'm joining the party :)

Conical hemisphere

Logging inequalities

You can't resist solving this!

Branched resistance

A sphere and a cube

Logging inequalities 2

Logging inequalities 3

Happy solving!

Log in to reply

Whoa this is a lot of problems! Logging inequalities 2 makes me want to cry, but I can see putting logging inequalities 3 in a challenge quiz. ;)

Log in to reply

Yeah,Logging inequalities 2 seemed unsuitable for a level 3 challenge quiz so I posted Logging inequalities 3.Thanks for selecting it :-)

Log in to reply

I am sorry to have missed the previous party $\ddot\frown$. I was able to do this for this party:

Beautiful resistors

Beautiful resistors - 2

Cubes form cuboid

Due to my exams, that's all I can help, will surely contribute more in the next party!

I have few old ones, you may consider this and this too. Thanks! $\ddot\smile$

Log in to reply

Don't worry about it Sravanth. Every contribution counts.

Log in to reply

Thanks! $\huge\ddot\smile$

Log in to reply

Guys , this is the list of wikis that need contributions!

Log in to reply

This is my question for kinematics- Three runners One winner. Hope you like it

Log in to reply

Thanks for having a will to contribute to wiki party Lakshya! But unfortunately , kinematics does not fall in the list of wikis that need contribution this time.I just post the list of desired wikis above.

Log in to reply

My surface area question.

Cube-Sphere

Log in to reply

Thanks Lee! Your questions are always so entertaining,

especiallywith the diagrams you provide. How'd you make this graphic, paint again?Log in to reply

I used an online generator.

Log in to reply

My problems for Resistors and Surface area : Pipe is that , Shocker! .

Log in to reply

Both great. I think we're even featuring one on social media. ;)

Log in to reply

Thanks

Log in to reply

I have a problem involving resistors. This is an old one, though.

Log in to reply

Whoa this looks really hard! I'll be sure it goes in a difficult resistors quiz. Thanks! Keep throwing your fun resistors questions here (easy or hard).

Log in to reply

Thank you!

Log in to reply

For Limits :

Easy Limits 2 and Easy Limits

Log in to reply

Sorry, but the selection of problems for limits of functions is already done.

Log in to reply

okay :(

Log in to reply

For Geometry Circles 1 And Circle 2And Calculus Happy nightmare

Log in to reply

Hi Refaat, these are great and I'll make sure they get to the right quiz a some point, but currently this problem writing party is focused on these topics

Log in to reply

Actually, this is my old one on Algebra-Logarithm, but I still enjoy it: Out of Reach

Log in to reply

I like it! I think this would belong more in Exponential Inequalities, given that you're solving something like $2^x > k.$ Granted, you have to take a log to figure out $x,$ but for Logarithmic Inequalities, I think there should be a log already present in the problem.

Log in to reply

Thanks, Andrew. I just came up with a new one in Tricky Quadratic Logarithm. Hope you'll like it, too. ;)

Log in to reply

Here is one for mechanics: Spinning Skater.

Log in to reply

Perfect. This one belongs in a quiz for sure. Thanks as always, Arjen! Keep them coming if you've got them. :)

Log in to reply

More coming. These are for calculus of parametric equations.

Log in to reply

Ahhh, these are great Hobart. @Arjen Vreugdenhil already wrote a beautiful solution to one of them. That makes it more likely to wind up in a challenge quiz. ;)

Log in to reply

Here is my question on logarithmic inequalities.

Log in to reply

Whoa, level 5! I never expected to see one of those in logarithmic inequalities. If we have enough hard logarithmic inequalities problems, I think it would be great to make a level 4-5 challenge quiz for this chapter!

Log in to reply

I'll start making more problems tomorrow, here is one for logarithmic inequalities

Log in to reply

Good one! I wasn't even thinking about the discontinuity that occurs. This makes for a fun, challenging problem for sure. This will definitely wind up in a quiz. Thanks! Feel free to throw more into this note. :)

Log in to reply

In my problems made before I found one that might be good for Surface Area

Log in to reply

Log in to reply

Thank you a lot, here is one for Rotational Kinetic Energy

Log in to reply

Calculus of Parametric Equations

Here is one forLog in to reply

For resistors, I'd suggest my Short Circuit? and (much harder) Path of Less Resistance.

Log in to reply

Here are 2 problems that I have made:

Resistors - 666

Graph theory - Bipartite Graph(s)

More problems are on their way!

Log in to reply

I'm loving the bipartite graph problem. That works both for computer science and combinatorics. ;)

Log in to reply

Wow. Good News @Andrew Ellinor $:)$

Here are my $3$ new questions for Surface Area. Will definitely add more in due course of time.

1) Percentage Increase

2) Cuboid cut into cubes

3) Cube Surface Area Increase

Log in to reply

These awesome graphics always add value to a problem. I know I'll be picking at least one of these (or maybe all three). Thanks Vighnesh!

Log in to reply

$\huge \color{#3D99F6}{\ddot \smile}$ $\boxed { \boxed{\text{Will try to add more in the near future}}}$

Log in to reply