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# New Checkpoint Added to Probability and Combinatorics Practice

We've added the following chapters to the Probability and Combinatorics Practice Map:

• Counting with Restriction
• Bijection / Injection / Surjection
• Counting 2
• Combinatorial Review 2

We will continue to extend the practice maps and add new maps on a regular basis. Thank you to all of our new Brilliant Squared members!

Note by Arron Kau
2 years, 8 months ago

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please add some new checkpoints in advanced algebra and calculus as well!!! Brilliant Squared is too gud!! · 2 years, 8 months ago

Cool. Noticed you put a link to Brilliant Squared members which reminded me of something. Could there be a page full of the names of people who subscribed to Brilliant Squared? I dunno, it'd be just kinda like a "Hall of Fame" sort of thing as an added benefit for subscription. :D · 2 years, 8 months ago

It was only a short time ago when you were supposedly strongly against $$B^2$$ · 2 years, 7 months ago