The Brilliant Community has been contributing interesting problems which are shared for everyone to enjoy. We have noticed a steady increase in the quality of problems that have been written up, which is much appreciated by the other members.

Here are some pointers to make your problems stand out:

- Simplify your statements and state them precisely. Do not try to be tricky.
- Use clear sentences and statements. Check your punctuation and grammar.
- Add a relevant image which helps to attract attention.
- Choose a title which reflects the content of the problem.
- Read other interesting problems and think about what made them interesting to you, and how they were put together.
- Share something unique and fun. Interesting and thought provoking problems tend to get more likes and shares.
- Write a solution, which allows others to learn from you. This also helps you to ensure that the problem is correctly stated.
- Add the (correct) topic and level, which provides context about your problems.
- Avoid any ambiguity; define uncommon terms.
- Present your math equations clearly. If you do not know Latex, you can always handwrite the problems, take a photo of it and upload the image. For example, Find Area Of Shaded Portion.
- Preview to ensure that your problem appears correctly. Read through your problem before hitting Post.
- Edit the problem as you respond to clarifications or disputes. Delete it if necessary.
- State the numerical constants that you used. Use typical values.

Examples of problems that the community liked:

Algebra: There Are Trains That Operate In The Himalayas?

Combinatorics: Saving The City, Destroying Public Property, Advancing Scientific Knowledge. All In A Day’s Work

Number Theory: My Calculator Says It Is True

Geometry: Particular Pentagon Point

Calculus: Spiders Perform This Cool Trick With Their Webs

Mechanics: Poor Bug, Will It Ever Succeed

Electricity and Magnetism: Lightning Can Hurt You

Computer Science: Knights And Knaves, Another Truth And Liar Problem

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Easy Math Editor

`*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

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TopNewestThese are excellent pointers. I hope that Brilliant will continue to push for quality of problems, but of course it depends on the Brilliant Community to keep up with the excellence. Problems should be clearly and well worded, and answers should be accurate and unique. Good peer review is a must for Brilliant to succeed in its goals.

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Yay, my problem for Mechanics! Thanks!

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That problem deserved to be there.

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Wow, this is really great! Thanks for mentioning my problem for the Algebra! I'm super happy right now! :D

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How to post questions

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On desktop, you can go to Community - Publish to post a problem.

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How should I do it in a smartphone

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Posting problems is currently not available in the apps.

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There are some way to know if a problem we want to share already was shared by someone?

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You should be able to see the total like and reshare stats on a particular problem. For example, this note currently has been liked 29 times, reshared 20 times and has 9 replies. I would encourage you to like and/or reshare problems that you are interested in, as that gives others a strong indication that you are engaged with it.

If you are the creator of a problem (and have email notifications enabled), we do send you an email indicating which person has liked / reshared your problem / note / set.

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I apologize for my english, of course I was not clear in my question. :-( My question was about how to avoid posting a repeated problems. (e.g., someone in the past have already posted same problem)

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Staff do not actively rate problems.

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I am not sure why but I have stopped getting emails of who all liked/reshared my questions via email. I used ro get them 2 weeks back. Now it has stopped.

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You can make a set of these problems, as a model for others to follow.

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Really helpful !!!

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For my problem, I think the image is cool haha

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Wow

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Which shell would be the first to have a g-subshell? A.5th energy shell B.4th energy shell C.3rd energy shell D.6th energy shell

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How do u edit or change the answer you have given for a problem?

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Report the problem. Brilliant staff will review reports from the creator and update the answer accordingly.

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It's very good question though don't know the answer Help Plzz....

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Ant moves in a cylindrical pipe? An ant starts from the top rim of the cylinder section of a pipe and reaches a point directly below its starting point after making three complete revolutions around the pipe...Find the distance travelled by the ant if the height of the cylinder is 24 cm and radius of the pipe is 3/pi cm .

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I think posting image is only possible via computer but not through mobile devices. How to include image while posting problem through mobile devices?

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You can always hyperlink to an existing image on the web via the markdown syntax of

`![caption](image URL)`

.If you are referring to using the browser on mobile, then when you post a problem, solution or note, you have a formatting toolbar that allows you to upload images directly.

Note that this functionality is not available for comments , on both mobile and the app. Note that you currently are unable to post problems or notes from the app.

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Thanks for replying sir.

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How can you post a picture in a problem that can zoom, so that the content of the picture are visible more clearly?

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There is currently no way to do that. Ideally, the picture should provide sufficient detail, and help guide understanding of the problem. It shouldn't be necessary to use the picture in order to answer the problem (except for actual pictorial problems in geometry).

At the most, you can request that people open the picture to zoom in.

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Sir, how should i decide the chapter of the question. Can you please suggest some good names?

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You can only choose from the chapters that are listed out in our topic maps.

When you start typing, you will see suggestions for possible candidates. E.g.

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Oops. Thank you for telling that now. In all my questions i have given the chapter "Counting"

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How to upload image of questions? Please provide me link, if we have to upload from mobile? Thank you

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Thanks for the info. My Problem "Triangles of the year just became popular. I'll try to make great problems as soon as possible.

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Thank you

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Thanks for the tips...

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Thanks yaar it is so useful

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There were 'n' people including chairman in the party. As per convention everyone has gotten some chocolates in the following manner. As A,B, C, D, E.... etc. have received 1, 2, 3, 4, 5... etc. Chocolates respectively. Before anyone has eaten any chocolate, chairman left the party with his chocolates. Later on the rest attendants recollected their chocolates in a box and then distributed evenly among themselves and thus everyone has received 13 chocolates. How many minimum number of person has attended the party?

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So far so good,:)...

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