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Paper folding

Classical Mechanics Level 2

Around how many times do you have to fold a piece of paper so that it's width is the distance from here to the moon?

40 4000 40000 400

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

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Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

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including olympiad champions, researchers, and professionals.

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by Robbie King

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