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:

Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .

Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.

Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.

Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

Markdown

Appears as

*italics* or _italics_

italics

**bold** or __bold__

bold

- bulleted - list

bulleted

list

1. numbered 2. list

numbered

list

Note: you must add a full line of space before and after lists for them to show up correctly

@Stanley Guo Please encourage your students to submit their solution along with their problem. Often, I am unable to understand what they are trying to say.

Please follow your students so that you will be able to see all of the problems that they have posted, and help to give them guidance about their problems.

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:

TopNewestList of questions that have been deleted.

Log in to reply

Problem should be posed as a note asking for the proof.

Log in to reply

Problem deleted because

- It is not relevant to the problem solving community.

- It is not in English. Please provide a translation.

Log in to reply

Are we (China's citizens) good or no good (in terms of character)? If you feel that we are good, key in $1$. Otherwise, key in $2$.

Not really a maths question...

Log in to reply

Log in to reply

This problem is trivial.

Log in to reply

This problem offers choices that are identical.

This problem is also had the incorrect answer.

Log in to reply

List of questions pending deletion.

Log in to reply

Options should be the value of the angles.

Log in to reply

@Stanley Guo Please take a loot at these, thanks!

Log in to reply

@Stanley Guo Please encourage your students to submit their solution along with their problem. Often, I am unable to understand what they are trying to say.

Of the recent problems that they posted, 4 out of 6 of them are nonsensical, and I will want to delete them. They are number of triangles in this painting, $\sqrt{a} ^ 2$ has 3 possible answers, Subtract all the answers, Find the angle with answer of yes.

Please follow your students so that you will be able to see all of the problems that they have posted, and help to give them guidance about their problems.

Thanks for your cooperation.

Log in to reply

Out of the 4 questions listed above, I have deleted 2 of them. They are

It is not clear which triangles are referred to in the diagram.

Answer of Yes / No did not make sense given the prompt of "Find the angle".

Log in to reply