Hello, Brilliant!

Thanks to everyone for your magnificent contributions to the previous problem writing parties.

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 seventh Problem Writing Party!

The party starts right now (May 5th, 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.

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!

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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:

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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)`

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Remember to wrap math in`\(`

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or`\[`

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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

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TopNewestIn a room there are 15 switch on a wall out of which only two are fan switch.In how many minimum no of ways a person can find which are the correct switches of each fan.

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Can you post this as a problem?

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105 ways? 15C2

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My entry for floor and ceiling functions I'm floored

And A force of different kind for acceleration , velocity ,displacement

pouring out powers of 2 and 3 for distribution in bins

no. of solutions for graph sketching

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All the problems are great. Thanks for such a wonderful contribution. :)

Hope to get more from you. @neelesh vij

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For introduction to recursion: Calculus and Computer Science Again . I know it's kinda more like for Comp. Sci. but still, it is good practice for recursion.

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Your link is placed wrongly. [word] followed by (website link)

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Thanks. c:

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So I'm curious...

When you submit a question, it would be nice to see the "incorrect" answers that are submitted.

That way, if you keep seeing the same "incorrect" answer, you would have an early heads up to either (a) clarify the wording in the question, or (b) update the answer. (Maybe all those answers are correct and its me who goofed up with my answer! :P )

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I agree with you!

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Yeah, I'd hate for great problems to go to waste just because they aren't well explained, or we happened to get the wrong answer in there.

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Guess that number!

For example, this question:39 viewers, 7 attempts and 0 solvers

Given the caliber of 39 random people on Brilliant, I doubt that no one would have solved it.

So, I am wondering whether some of those 7 attempts might actually be correct, but I just goofed up... (Wouldn't be the first time! :P )

And, I figure I need to get it fixed up quickly if so, since the questions have a shelf life of about 3-4 days. If they don't get some kind of action by then, it seems they are very likely to go into the vast wasteland of forgotten questions! :-/

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Let $N(H,L)$ = The maximum number you can accomplish this in given that you can get only get $H$ "too high"s and $L$ "too low"s, then...

$N(0,L) = L+1$

$N(H,0) = H+1$

$N(H,L) = 1 + N(H-1,L) + N(H,L-1)$

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Log

Here is my question too. 45 views 5 attempts 1 solverLog in to reply

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this. Please do not consider it same. Theres a difference between these

If you get it wrong tryLog in to reply

@Geoff Pilling

If you think that the problem needs to be clarified or the given answer is incorrect, then you should report the problem. And the staff can look into the details.

Thanks!

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For logical reasoning topic, we need problems mainly on

Truth Seekingsubtopic. Thanks!Log in to reply

This easy problem on floor from my side sir

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To my surprise u have reposted this question sir !!!!!!!!

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@Sandeep Bhardwaj Sir . This is my submission for

Truth Seekingsubtopic. A total of 6 problems.Log in to reply

My submissions Math Archive (13)

Math Archive (14)

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Woo hoo... Sounds good! Looking forward to some great problems! :) (I'll try writing some as well)

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Here is my contribution for the acceleration one.

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Here's my entry: Logic-puzzle-Sphinx's Riddle, Who stole my walnuts?, Dark Room Hunt, Cat's Logic

Combinatorics-Distribution to the Bin-Is your date odd or even?, Fruit Lovers.

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2 questions for the topic: Function graphs.

Here and here

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So, should we write new problems for these pages, or use ones we've already published?

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My entries for Logic 1 Logic 2 Logic 3

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This is my new one for Combinatorics-Recurrence Incursion: Wire Hive.

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Here is a question on recursion

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a problem about decimals

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My first problem here.

Decimals Warmup

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Who can swim?

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Here are two submissions for logic: 1) A Murder Mystery Game 2) Alien Abduction Problem

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My entry for Velocity and Acceleration

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Count me in with this classic piece of calculus-1920 Calculus Horror

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Hi Anshuman. Nice problem! You can make your comment formatted more nicely by the following:

$\text{[Paste problem title here](Paste URL link for problem here)}$

Thanks!

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Done Thanks

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My entries will be listed here.

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Nice problem! I hope you to increase the number of entries listed here. ;)

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Thanks. I'll try but still have many exams coming up.

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My submission for curve sketching : Desmos is for donkeys

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Wonderful problem! I loved this problem very much. Thanks for sharing this!

Waiting for more problems. @Rohit Ner

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My entry is for complex numbers: A Problem in Complex Numbers!

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The problem is good. But it is not from the topic listing of this party. Thanks for the problem and I'm excited to get awesome problems from the topic listing for this party.

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I am extremely sorry for the late entry, it is because I have not opened brilliant for a week in between and I just opened today. As I saw the party ends on the day of my last important entrance examination for college. I am posting a problem now, and will be back in the 18th with a lot more.

Weigh it out

Unique Decimal

On function graphs

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You have interchanged the brackets!

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Yea sorry, I forgot all my LateX in all this pressure with the exams. :p

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@Soumava Pal

Great problem! Waiting for more problems as soon as you get done with your exams.

All the best for your exams!

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Parabola : https://brilliant.org/problems/interesting-parabola/

Basics in Area : https://brilliant.org/problems/just-two-lines/

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Here's my new one for Combinatorics-Distribution into Identical Bins: The pawn can't stand alone.

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A great one as usual. ;)

Thanks Dr. Warm! Waiting for more. :P

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Thanks! Looking forward to it, too. 😉

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Here is my question for logic

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Great! Thanks Prince for an awesome problem.

Waiting to see more of your awesome problems. :)

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My problem for combinatorics expected value: A surprising invention. My problem for combinatorics recurrence relations:The Chase of Doom

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Nice problem! @Www Www

You can display the link of your problem by using the syntex: [Name of the problem] (link of the problem) and then your link will be displayed as Name of the problem.

Excited to get more such great problems on your behalf. Thanks!

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THIS is a fresh ceiling problem ;D

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Nice problem, Margaret! Thanks!

Waiting for more from your side. ;)

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Thanks and I will keep working:) My exams are coming up next week so I am trying my best.

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1 2. 2 problems on distances, velocity, acceleration..

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displacement when v=0 problem on displacement and velocity

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My contribution to floor and ceiling functions: A road with holes

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An interesting logic problem,a challenging one

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My submission is "TEDIOUS I"

https://brilliant.org/problems/tedious-i/

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A graph problem

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My submission for decimals. : Working out with decimals!

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My question on floors and ceilings.

Don't Get Confused!

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(sine)ing a problem on displacement, acceleration, velocity

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My entry for complex numbers and binomial theorem (I still solve some): Ouch...

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My new one for Function-Graphs: Double Crosses

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Another problem on displacement, velocity, acceleration can u average (sine)ing function?

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Here is my problem on displacement, velocity and acceleration topic - Desing of the car is a wow.

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New one for Combinatorics-Expected value: Double Gamble.

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What is the maximum powers of 2 that 10 raised to 10 can divide without decimals?

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My entry for Floor and Ceiling Functions: That's actually really cool!.

My entry for Decimals: Decimals, Fractions, Scientific Notation and Percentages?!.

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A hard logic puzzle

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