I'd be using this post to help organize good problems which are lacking worthy solutions.

If you would like to see a solution to a particular problem, please state the problem title, provide a link to it and also state the topic. You can also @mention the creator, so that she/he is made aware. If the problem was already listed, you can upvote the comment. To keep this list reasonable, these problems should have been posted for at least a week.

If you added a solution to the problem, please reply to the comment. Once your solution has been upvoted several times, I'd then clear out the comment, so as to keep things fresh. (Do not post your solution as a reply)

Once someone has added a solution, I will push the comment to the top. Please can check their solution, and provide some feedback on it. If you have a different approach, add it and enlighten all of us.

Kudos to the following for writing solutions.

1. Jatin Yadav \( \times 3 \)

2. Siddhartha Srivastava

3. Kumar Gupta

4. Jon Haussman

5. Beakal Tiliksew

6. [Happy melodies}(https://brilliant.org/profile/happy-a75fqm/feed/)

7. Pranav Arora \( \times 2 \)

8. Nathan Ding

9. N K

10. Ariel Gershorn

Solutions which need reviewing

1. Another Infinite Circuit

2. Colourful Electrons

3. Domino domination

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## Comments

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TopNewestAnother Infinite Circuit, Electricity and Magnetism

@Vishnuram Leonardodavinci and @Jon Haussmann , can you please add a solution to this problem?

I understand it sounds strange because I am myself in the recent solvers list. My approach to this problem is flawed (which I later realised). I will explain it in comments once the solution is posted.

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@Calvin Lin : Jon Haussmann has added a solution to the problem, can you please add him to the list? :)

Thanks!

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@Sharky Kesa I would like a solution to A trigonometric integral , Calculus

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@Sharky Kesa : Can you please post a solution to this? :)

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@Jon Haussmann @Cole Coupland Can you please post a solution?

Thanks.

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@Sharky Kesa Can you add a solution? Thanks.

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One for CS Twenty million chances to get it wrong

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Ah yes. I remember this problem. I'd love a solution to this

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@Chung Gene Keun Can you add a solution to this problem?

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The Answer Is Not 0.225, Algebra

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@Sami Cool @Ritwik Mohanty @Nilotpal Chakraborty @Irvi Firqotul Aini @Kevin J. @Sameer Wadjikar

Care to share how you solved this problem?

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@Milun Moghe I would like a solution to We Often See It Like This Electricity And Magnetism

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@Vishnuram Leonardodavinci Care to share how you solved this problem?

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Can @Anish Puthuraya please add a solution to the problem The Journey of the Solitary Rod? https://brilliant.org/community-problem/the-journey-of-the-solitary-rod/?group=aEbPpxv9oKGo&ref_id=186844

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@2000 as Powers of 2..............please provide a solution to this ....@Calvin Lin @Daniel Liu @jatin yadav @Vishnuram Leonardodavinci @Jon Haussmann

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I would like a hint or a solution to the problem Domino Domination..

My approach was to come up with a recursive definition of the process and then find the solution using a computer program but I couldn't do it.....Should the problem be approached in any other way??

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Solve the recurrence relation, and you should be able to obtain an explicit formula. Check OEIS if necessary.

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What is OEIS??

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Link

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Sir can you help me with this problem??Especially the case where it is generalized(nxn determinant)??

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ascending and descending please provide a solution to this problem @Calvin Lin @Jon Haussmann @Daniel Liu @Vishnuram Leonardodavinci @jatin yadav @Eddie The Head

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Its just a note. But could someone please post a suggestion on how to go about with it Buried Treasure

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How to solve this??? 2014 towns? 1402 roads? @Hoo Zhi Yee

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https://brilliant.org/community-problem/its-youngs-excluded-not-olds-included/?group=lyFLsSKNBAIu @Milun Moghe @Vishnuram Leonardodavinci @Anish Puthuraya

Can you please add a solution to it?

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@Jon Haussmann @calvin lin @ Vishnuram leonardodavinci Ap or not ap part 2 .....Please provide a solution to this problem

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This problem

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Having a doubt in this problem can you please check @Calvin Lin

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This problem

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@Jon Haussmann sir please provide a solution to Not as easy as it looks

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I have posted a solution.

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Thanks a lot again

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I would like a solution to this Electricity and Magnetism problem: Gauss Practice (Hard)

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Am I expected to tag people here?

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Yes then they'll come to see your post

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@David Mattingly: Sir can you please post a solution to the problem?

Ok.Log in to reply

@Jon Haussmann sir please provide a solution for ... Inspired by mehul chaturvedi

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Can you post the link to the problem?

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I'm guessing he means this problem. However, there are already several distinct solutions posted.

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@Brian Charlesworth @Jon Haussmann sir please provide a solution to That is close

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Like I said before, you need to provide a link to the problem.

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i have posted the link https://brilliant.org/problems/that-is-close/?ref_id=1232530

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@Jon Haussmann sir can you provide solution to this

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@Michael Huang can u please provide a solution to your problem Sum tower of hanoi

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Ah, but the problem is very difficult that no one has proven the answer yet. It's interesting though!

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@Michael Huang where did you get this question from??Maybe we can search for the source to find a solution finally !!!

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@Michael Huang so how did you come up with the answer ?? p.s Great to know that it is original problem :)

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