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Challenge 57: Envelopes
Envelopes: How do you fold a sheet of paper to make an envelope? Figure This!
Challenge 58: Gone Fishing
Gone Fishing: My, little fish, how you've grown!
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Challenge 59: Japanese Floors
Japanese Floors: How do I cover thee; let me count the ways. Tatami Mats
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Challenge 60: Number Tricks
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Number Tricks: Bet I can guess your color!
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