How to solve more Challenges Problems in lower levels?

In Brilliant, if we solve more, we'll level up. But I wonder if we want to solve more problems in old levels, what will I do? Because very many good Math exercise in lower levels that I can't solve. Thank you forr your reading, guys!

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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TopNewestYou can look at other people's profiles and solve their problems :)

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