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Brain Teasers

by Khan Academy

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Description

Random logic puzzles and brain teasers. Fun to do and useful for many job interviews!

Customer Reviews

Helpful

These videos are extremely helpful In understanding complex ideas.

Re: Very un-rigorous

**Also potential spoiler alert**

The simple explaination that all factors are paired in numbers that are perfect squares is a simple language equivalent to the rigorous proof. These are meant to give a simple explaination to what appear to be complex problems, and do a very good job of that. The explainations of all the problems are complete but not frivolous.