Hello Brilliant!

Brilliant's third Problem Writing Party was a great success as always. Thanks to all the contributions from Rohit, Efren, Sravanth, Agnishom, Hobart, Refaat, Chan Lye, Hjalmar, Pranshu, Manmeswar, Soumava, Racchit, Lakshya, Chinmay, Worranat, Anish, Arjen, Rajdeep, Nihar, Hobart, Jason, Pranshu, Margaret,, Lee, Jason, Vignesh and the countless others of you who helped!

This week, we were able to create a 5 new quizzes. Here are the quizzes that you all helped create:

New Brilliant Challenge Quizzes

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 fourth Problem Writing Party!

## How it Works

The party starts right now (February 29th, 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 make a submission to.

Happy writing and continue to party on!

## Comments

Sort by:

TopNewest\[\Large \text{The topics for this party can be found in the link below}\]

Topics for the problem writing party

Remeber: Your problem has a better chance of being selected if you include a graphic (when appropriate) and a solution.– Andrew Ellinor · 9 months agoLog in to reply

– Sandeep Bhardwaj · 9 months ago

And don't forget to use the latex (where appropriate) in the problem and the solution.Log in to reply

– Sridhar Sri · 9 months ago

Can I use Daum application to post a problem or to write solution?Log in to reply

@Sridhar Sri Yes you can, for now. But it would be great if you post the problem/solution into latex and text. If you need any guidance on latex, Daniel's LaTex Guide will help out gently. Thanks!

Waiting for you problems. \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

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the time-keeper :-a problem i made

SHM physical pendulum – Rohith M.Athreya · 9 months ago

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@Rohith M.Athreya Very nice problem. Thanks for your contribution. Looking for your innovative problems of more topics. :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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Hey there people :)

Here is my set.I will keep adding more problems. – Mehul Arora · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Wow! Great, you've created a complete set which is awesome. Thanks a lot! Waiting for new problems to be added to the GREAT SET of yours. \(\ddot \smile\)Log in to reply

Just a result of Fiitjee teaching me SHM :P – Mehul Arora · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Great. All the best for your excellence at all the subjects you're studying!Log in to reply

– Mehul Arora · 9 months ago

Thank you so much sir ! :DLog in to reply

Computer Science \( \rightarrow \) Sorts

Sort the sorted

Tidying Up Some Numbers

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– Andrew Ellinor · 9 months ago

I knew I could count on you for some good computer science problems Zeeshan. ;)Log in to reply

– Sandeep Bhardwaj · 9 months ago

This is a great contribution. I loved the problems. Thanks! \(\ddot \smile\)Log in to reply

My submission:

Floor and ceiling functions: One, Two, Three

Capacitors: One, Two, Three, Four, Five, Six

Transformers: Step-up or Step-down?, Transformer DC

3D Coordinate Geometry: Three

I will update this comment if I share more problems. This is the set containing all of my problems for this party - Set – Pranshu Gaba · 8 months, 3 weeks ago

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Here are some problems on Floor Functions, hope you like it .

This Floor is slippery and I love 333, but this is ... . – Anish Harsha · 9 months ago

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@Anish Harsha – Sandeep Bhardwaj · 9 months ago

Nice problems Anish. The first one is yummy. Thanks!Log in to reply

– Anish Harsha · 9 months ago

You're welcome, sir ! :DLog in to reply

Another level of question on Combinatorics-Recursion: Fractal Cubes.

This one may be a little crazy. ;) – Worranat Pakornrat · 9 months ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Why are all of your problems so awesome?Log in to reply

– Worranat Pakornrat · 8 months, 3 weeks ago

Thanks! Maybe because I got inspired. ;)Log in to reply

Electricity and Magnetism \( \rightarrow \) Circuits \( \rightarrow \) Resistors \( \rightarrow \) Equivalent Resistance \( \rightarrow \) FUN :) – Zeeshan Ali · 9 months ago

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@Zeeshan Ali The circuit looks like the first letter of my name. I loved it. Thanks! :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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I don't see any Computer Science question.!! Hurry up, you computer scientists! :) – Zeeshan Ali · 9 months ago

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Here comes my new one on Combinatorics-Recursion: Fractal Squares.

Hope you'd like it. ;) – Worranat Pakornrat · 9 months ago

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Here are my entries..............

Capacitors - 1

Capacitors - 2

3D - 1

3D - 2

F n C - 1

SHM - 1

SHM - 2

Enjoy Solving!!! – Manmeswar Patnaik · 9 months ago

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@Manmeswar Patnaik Thanks \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

Great problemsLog in to reply

@Sandeep Bhardwaj – Manmeswar Patnaik · 9 months ago

Thanks Sir!!.....Please check out the other entries............Log in to reply

Here is a problem on recurrence. – Svatejas Shivakumar · 9 months ago

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@Svatejas Shivakumar

Nice problemIt would be great if you post an awesome solution to your problem to get it featured. Thanks! \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

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Here's mine contribution on capacitors – Akhil Bansal · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Nice one. It would be great if you post an awesome solution to your problem to get it featured. Thanks! \(\ddot \smile\)Log in to reply

I posted a problem on recurrence relations a few days ago.

This sounds fun, until you realize your life is at stake – Zk Lin · 9 months ago

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– Andrew Ellinor · 9 months ago

Wow! This one is a bit too hard for what we're looking for in recurrence relations, but I think you've got a knack for writing some good problems. Got any fun, easy ones tucked away?Log in to reply

– Zk Lin · 9 months ago

Sure, will try to come up with some fun but accessible problems. I will update the post above if I manage to write some nice ones. :)Log in to reply

Here are mine: ( I will keep updating)

Great Circles (recursion)

Only 0,1,2,3,4 (recursion)

Is it Algebra at all? (3-D Geometry)

Another recursion problem (recursion)

Fat Subsets (recursion)

Emergency to return (recursion) – Soumava Pal · 9 months ago

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– Toto Mub · 9 months ago

I like treesLog in to reply

– Sandeep Bhardwaj · 9 months ago

Cool Problem. Thanks!Log in to reply

Do check out my problems. :) I added 5 more of them. I will add more after my chemistry exam on the 9th. – Soumava Pal · 9 months ago

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@Soumava Pal :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

Nice problems.Log in to reply

@Sandeep Bhardwaj

Thanks – Soumava Pal · 9 months ago

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I would like to contribute this problem I'm Floored for the party – Neelesh Vij · 9 months ago

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@neelesh vij Thanks :) – Sandeep Bhardwaj · 9 months ago

Nice ProblemLog in to reply

See my problem, Battery Charger on the topic Capacitors and Transformers. :) – Anish Harsha · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Looks great! :)Log in to reply

Here's my first one for Geometry-3D Coordinates: Box in the Air.

Hope it's not too easy. ;) – Worranat Pakornrat · 9 months ago

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@Worranat Pakornrat – Sandeep Bhardwaj · 9 months ago

Cool problem with a cool name. Thanks Dr. Warm!Log in to reply

– Worranat Pakornrat · 9 months ago

You're welcome. Surely more will come. ;)Log in to reply

Blank – Zeeshan Ali · 8 months, 2 weeks ago

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Sorry this is a late entry please improve it

PS:- I don't have solution – Lakshya Sinha · 8 months, 3 weeks ago

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– Arjen Vreugdenhil · 8 months, 3 weeks ago

Your problem is too general... State what kind of sentence it is! (It looks quadratic, but is it?)Log in to reply

Please check a question on floors and ceiling click here. Please a mod or staff improve this up. Thanks – Lakshya Sinha · 8 months, 3 weeks ago

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– Andrew Ellinor · 8 months, 3 weeks ago

It's more likely to be chosen if you give it a solution. ;)Log in to reply

My new one on Algebra-Ceiling & Floor Functions: Hit the ceiling! Hit the floor!.

Hope it's not too easy. ;) – Worranat Pakornrat · 8 months, 3 weeks ago

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3D coordinate geometry: It's a bird! It's a plane! It's not superman... – Hobart Pao · 8 months, 3 weeks ago

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a problem on recursions at loggerheads with logarithmic recursions – Rohith M.Athreya · 8 months, 3 weeks ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Great one, thanks!Log in to reply

This is my new question on Geometry-3D coordinates: Simple Section.

Enjoy! ;) – Worranat Pakornrat · 8 months, 3 weeks ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Enjoyed! ;) It was enjoyable.Log in to reply

– Worranat Pakornrat · 8 months, 3 weeks ago

Thanks! I enjoyed writing it, too. ;)Log in to reply

My new problem on Curve Sketching Inspired From Inspiration – Rishabh Deep Singh · 8 months, 4 weeks ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

You post the problems which are quite helpful specifically for the guys who are preparing for JEE. That's great. Thanks!Log in to reply

– Rishabh Deep Singh · 8 months, 3 weeks ago

Sir i am preparing for JEE-ADV 2016 and my board exams are finished. Now i am Free.Log in to reply

– Sandeep Bhardwaj · 8 months, 3 weeks ago

That's great. Now you can post more problems for the party. ;)Log in to reply

– Rishabh Deep Singh · 8 months, 3 weeks ago

I need to prepare for JEE Mains so i need to study for that . Any suggestions?Log in to reply

Jee Queries with the Best Solutions. And if you have any specific questions, let me know and I'll help you out. – Sandeep Bhardwaj · 8 months, 3 weeks ago

You can check out my set:Log in to reply

– Rishabh Deep Singh · 8 months, 3 weeks ago

Thanks Sir.Log in to reply

A floor/ceiling problem. I'm going to try to think of some for curve sketching, but so far the only ones I have done before/thought of require you to actually sketch the curves...

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– Kunal Verma · 8 months, 2 weeks ago

Cool problem.c:Log in to reply

@Hobart Pao Lovely problem. Yeah, I agree with the point you made. It involves the use of many concepts likely graph of floor function, geometrical interpretation of integral, arithmetic progression sum, finding the roots of a quadratic equation. :P – Sandeep Bhardwaj · 8 months, 3 weeks ago

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@Kunal Verma, @Sandeep Bhardwaj! – Hobart Pao · 8 months, 2 weeks ago

Thanks for the encouragementLog in to reply

@Andrew Ellinor I just had another problem created, but I could not format it correctly. Could you please help? the problem means "the floor function of the absolute value of \(\frac {2x-3}{4}\)". What floor is it? – Margaret Zheng · 9 months ago

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Also, I like this problem so much that it's definitely going into a quiz. – Andrew Ellinor · 9 months ago

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– Margaret Zheng · 9 months ago

thanks:DLog in to reply

Here's my recursion problem: Vole crossing

This might be too difficult for a quiz, but I think it's a pretty neat problem. – Kerry Soderdahl · 9 months ago

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@Kerry Soderdahl This problem can be defintely used for some Level 4-5 quiz. Thanks! Looking for more great problems. :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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My third question.

Sigma Ceilings – Lee Care Gene · 9 months ago

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@Lee Care Gene Nice building of ceilings. I enjoy your problems a lot. :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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the time-keeper :-a problem i made

SHM physical pendulum – Rohith M.Athreya · 9 months ago

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@Rohith M.Athreya Great Great Great! Looking for more of your innovative problems for other topics of the Problem Writing Party. :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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sum of some floored,summed series

a problem on floor functions that i made :) – Rohith M.Athreya · 8 months, 3 weeks ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Very nice problem. I've edit this to make the latex clearer, see if that's good?Log in to reply

– Rohith M.Athreya · 8 months, 3 weeks ago

Yeah thanks! looks much more clearer now. :)Log in to reply

This one for starters: Triangle and Line. – Arjen Vreugdenhil · 9 months ago

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@Arjen Vreugdenhil Yummy starter! :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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Here is another problem, for 3D Coordinate Geometry – Hjalmar Orellana Soto · 9 months ago

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@Hjalmar Orellana Soto Tangent in three dimensions is coolest. Thanks! :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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My new Question on Inductor + Capacitor – Rishabh Deep Singh · 9 months ago

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@Rishabh Deep Singh

Good problem. But it is recommended and it's great that you don't include the

textinto the latex. Use latex only for mathematical expressions. Can you please make edits to your problem accordingly?Thanks! – Sandeep Bhardwaj · 9 months ago

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– Rishabh Deep Singh · 9 months ago

I will do it in my upcoming Questions.Log in to reply

– Sandeep Bhardwaj · 9 months ago

Great! I will convert this problem into text and latex necessarily. Thanks!Log in to reply

@Rishabh Deep Singh I've edited the above problem of yours. Can you please check if it's all good? – Sandeep Bhardwaj · 9 months ago

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– Rishabh Deep Singh · 9 months ago

Thanks Sir It is perfectLog in to reply

Another new one on Geometry-3D coordinates: Box in the Air (Part 2).

Have fun! ;) – Worranat Pakornrat · 9 months ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

I would like to fit myself diagonally in that box which will be a great exercise. :PLog in to reply

– Worranat Pakornrat · 8 months, 3 weeks ago

Haha...would you like to be a cat in the box? ;)Log in to reply

– Sandeep Bhardwaj · 8 months, 3 weeks ago

No way man! Then I will be stuck forever there if no one comes to help me out. :P How will I use Brilliant then?Log in to reply

– Worranat Pakornrat · 8 months, 3 weeks ago

By using local box network maybe. Lol...Log in to reply

You'll definitely enjoy solving the following problems:

Resistors \( \rightarrow \) Equivalence of Resistors

Resistors \( \rightarrow \) Product of equivalent resistances

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@Zeeshan Ali I like the beautiful circuits in your problems. Thanks! – Sandeep Bhardwaj · 8 months, 3 weeks ago

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My contlibusion: Andlew's Dleam

Sorry , I can contribute only one problem this time :( – Nihar Mahajan · 9 months ago

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Night ploblem. ;) – Sandeep Bhardwaj · 9 months ago

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– Nihar Mahajan · 9 months ago

Thyankss!!Log in to reply

I added a few problems in logarithm inequalities. What do you think of them?

When is this logarithm inequality true

Split a log

Many logs inequality

Calculus of parametric equations can be tricky. I might try just parametric equations. – Chung Kevin · 9 months ago

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It would be great if you post the problems from the topic list of this party which can be seen at the Publish Page.

Thanks! – Sandeep Bhardwaj · 9 months ago

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My second question.

Sigma Floors – Lee Care Gene · 9 months ago

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Is the ground floor left empty for rent?Log in to reply

– Lee Care Gene · 8 months, 3 weeks ago

Maybe XDLog in to reply

Computer Science \( \rightarrow \) Sorts

Original array retrieval

Tidying Up Some Numbers Again

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– Sandeep Bhardwaj · 8 months, 3 weeks ago

Nice ones. These will be great for a quiz. Thanks!Log in to reply

Try my new question Limit It is out of given topics. – Rishabh Deep Singh · 9 months ago

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thisproblem writing party? – Andrew Ellinor · 9 months agoLog in to reply

– Rishabh Deep Singh · 9 months ago

Ok I will.Log in to reply

Electricity and Magnetism \( \rightarrow \) Circuits \( \rightarrow \) Capacitors and Transformers \( \rightarrow \) Never mind – Zeeshan Ali · 9 months ago

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Can I post the questions till 13 March – Deepanshu Dhruw · 9 months ago

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@Andrew Ellinor can definitely count upon your numerous contributions for many topics for this party :) – Nihar Mahajan · 9 months ago

Yes , of course! Looks likeLog in to reply

@Deepanshu Dhruw I see that you post good problems. Excited to see your problems for this party. And yeah you can post the problems till 13 March. I'm waiting. :) – Sandeep Bhardwaj · 8 months, 3 weeks ago

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– Deepanshu Dhruw · 8 months, 3 weeks ago

ThanksLog in to reply

Here's one for floor and ceiling functions:

Don't Try And Math It – Brandon Monsen · 9 months ago

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@Brandon Monsen

Nice problemIt would be great if you post an awesome solution to your problem to get it featured. Thanks! \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

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– Brandon Monsen · 9 months ago

Just posted one! I'll make some edits for coherence but the meat of it is there.Log in to reply

This time my contribution will be poor, but here is something for Floor and Ceiling Functions – Hjalmar Orellana Soto · 9 months ago

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My first question.

The Past, The Present And The Future With Ceilings And Floors – Lee Care Gene · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Nice Problem. But the expression needs to be made more clear. In the numerator, does "2015/2016" represents the power of "2015"?Log in to reply

My question on Capacitance An electricity and magnetism problem by Rishabh Deep Singh – Rishabh Deep Singh · 9 months ago

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Here are my problems(I would keep updating):

https://brilliant.org/problems/a-simple-recursion-for-2016-and-2018/?group=NizZDUR4Adun – Samarth Agarwal · 9 months ago

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@Samarth Agarwal

Nice problemFYI if you want to link a problem, you can do it this way \(\to\) [Name of the problem] (link)

I'm linking your problem in this comment. Here it goes: A simple recursion for 2016 and 2018

Excited to see more problems from your side. Let me know if you've any queries. Thanks \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

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– Samarth Agarwal · 9 months ago

Thanx sir for creating a link to my problem, I would try to contribute more but I have exams till 18th March :(Log in to reply

All the best for your exams! – Sandeep Bhardwaj · 9 months ago

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– Samarth Agarwal · 9 months ago

Thank you Sir.... :)Log in to reply

This is my new question of Calculus-Curve Sketching: Rise within Roots.

Enjoy! ;) – Worranat Pakornrat · 9 months ago

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– Andrew Ellinor · 9 months ago

All right! Looks good. We could use some great curve-sketching problems.Log in to reply

– Worranat Pakornrat · 9 months ago

Thank you. Glad you'd like it. ;)Log in to reply

More coming. These are for floor/ceiling fxns:

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– Andrew Ellinor · 9 months ago

Now these look like some mind benders! I'm excited for these.Log in to reply

– Hobart Pao · 9 months ago

Thanks! :)Log in to reply

– Rishabh Cool · 9 months ago

I was writing the solution for your last two problems... But then I realised it was very tough to explain in solution and tiring latex work is also required!!Log in to reply

Here's my introductory problem for Simple Harmonic Motion(Waves- Doppler Effect) Shake it to my Beats – Kunal Verma · 9 months ago

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– Andrew Ellinor · 9 months ago

Beautiful! More Simple Harmonic Motion problems would be great if you can think of some fun ones! :)Log in to reply

Here are some problems (I will keep updating this as I post more)

Floor and ceiling functions:

Pixelated Poké Ball

Let's go up a floor

Curve sketching:

Dueling functions

Where do we start?

Try FOILing, maybe? – Jonas Katona · 9 months ago

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Pixelated Poke Ball, being a huge pokemon fan myself. – Zk Lin · 9 months ago

Nice set! I particularly enjoyedLog in to reply

– Andrew Ellinor · 9 months ago

I knew I could count on you to post a handful Jonas. These look great!Log in to reply

– Jonas Katona · 9 months ago

Thank you guys for the support! :)Log in to reply

I have included over 27 mind blowing problems in my set 26 mind turning problems – Rishabh Sood · 9 months ago

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– Andrew Ellinor · 9 months ago

But do they have anything to do with the topics listed in this problem writing party?Log in to reply

– Rishabh Sood · 9 months ago

First thing, why are you after my life? 2 thing 50% of the problems are related to the topics, and the last thing I did not consider making a new set for just posting hereLog in to reply

– Mehul Arora · 9 months ago

Rishabh, First of all, please be a bit polite. Andrew is staff, and he knows exactly what is good for this wiki writing party. He only wants to make this Community a better place. He is not after your life.Log in to reply

– Rishabh Sood · 9 months ago

Hmmmmm, okLog in to reply

here and contribute awesome problems which would force Andrew to select! – Nihar Mahajan · 9 months ago

I viewed your set and it has very nice problems. But sorry to say , I can't find a single problem related to the topics in this problem writing party. You might review the topicsLog in to reply

– Rishabh Sood · 9 months ago

Ok!, I will do it, but I have my pre-boards and finals so I will come back to brilliant only after thatLog in to reply

My Problem on Oscillations A classical mechanics problem by Rishabh Deep Singh – Rishabh Deep Singh · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

Again a nice problem!Log in to reply

See My Problem Roots Finding – Rishabh Deep Singh · 9 months ago

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@Rishabh Deep Singh

Nice problemI'm quite glad to see you contributing such wonderful problems. Thanks \(\ddot \smile\) – Sandeep Bhardwaj · 9 months ago

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– Rishabh Deep Singh · 9 months ago

Thanks Friend.Log in to reply

What are the topics that we need to put questions? – Rishabh Deep Singh · 9 months ago

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Publish Page to get the topics needed for contribution.

You can go to theLooking forward to have awesome problem from your side. Thanks! :) – Sandeep Bhardwaj · 9 months ago

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– Rishabh Deep Singh · 9 months ago

Thanks.Log in to reply

Here are the questions from my stock on Combinatorics-Introduction to Recursion:

Snip! Snip!

Can you count all these oranges?.

Have fun! ;) – Worranat Pakornrat · 9 months ago

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– Sandeep Bhardwaj · 9 months ago

You've got a nice stock. Congratulations!Log in to reply

– Worranat Pakornrat · 9 months ago

Thank you. Hope to come up with new ones, too. ;)Log in to reply

This is my fun question on Algebra-Floor & Ceiling Functions: Which day was it?.

And for Combinatorics-Variance: Who's the tallest of them all?.

It's kind of straight forward, but I still like it. ;) – Worranat Pakornrat · 9 months ago

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FYI you should use "\left \lfloor ... \right \lfloor" if the expression inside the floor doesn't fit well.

Thanks! – Sandeep Bhardwaj · 9 months ago

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– Worranat Pakornrat · 9 months ago

Oh, OK. Probably I was kind of lazy at night. Thanks for your advice. ;)Log in to reply