Unlock set for practice section

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Calvin Sir or anyone please suggest me the way of unlocking more difficult sets of practice session!!!!! I will be grateful!!!

Easy Math Editor

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Markdown	Appears as
`italics` or `_italics_`	italics
`bold` or `__bold__`	bold
- bulleted - list	bulleted list
1. numbered 2. list	numbered list
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Math	Appears as
Remember to wrap math in `$` ... `$` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$

Comments

What do you mean by 'difficult sets'? Each technique has three difficulty levels: Basic, Intermediate, Advanced. For each of those difficulties, one problem set is already unlocked. You can unlock more sets by inviting friends, but those sets are not more difficult than the ones you already have.

Tim Vermeulen - 7 years, 11 months ago

Hello, in my experience you can unlock more sets by inviting your friend to brilliant. You can get the invitation link in practice session below the "Unlock More Sets" blue botton. For example: http://brilliant.org/invite/bhjC6oDoiB4sk/ is my invitation link. Each successful invite grants you access to 10 additional problem sets. Hope this helped!

Fariz Azmi Pratama - 7 years, 11 months ago

Math	Appears as
Remember to wrap math in `\(` ... `\)` or `\[` ... `\]` to ensure proper formatting.
`2 \times 3`	$2 \times 3$
`2^{34}`	$2^{34}$
`a_{i-1}`	$a_{i-1}$
`\frac{2}{3}`	$\frac{2}{3}$
`\sqrt{2}`	$\sqrt{2}$
`\sum_{i=1}^3`	$\sum_{i=1}^3$
`\sin \theta`	$\sin \theta$
`\boxed{123}`	$\boxed{123}$