/u/BarcodeNinja's posts in /r/askscience
123 upvotes
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Why is it that if you multiply any number by nine and add up the digits of the product, they also equal nine? For example 9x12=108. 1+0+8=9
84 upvotes
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So I've been pretty inactive for a few weeks, then I had to go hiking for ten days. The first hour was brutal on my cardiovascular system and muscles, but after that first hour I felt fine. What happened, exactly?
15 upvotes
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12 upvotes
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9 upvotes
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