What are all the ways you can unlock practice sets?
4 years, 1 month ago
It is a little confusing right now:
You can unlock practice sets in the algebra section by completing topics sequentially, and mastering each skill. You can skip ahead to some topics in the skill map by going to the check points to find problems of your difficulty level.
In the Number systems, Functions, and Calculus sections, you unlock more sets by recruiting friends to join Brilliant.
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I believe in the algebra section, within a topic or category, you just keep getting more problems till we run out of them, even after you have earned that skill.