My 12 Favorite Questions.

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“You have to keep a dozen of your favorite problems constantly present in your mind, although by and large they will lay in a dormant state. Every time you hear a new trick or a new result, test it against each of your twelve problems to see whether it helps. Every once in a while, there will be a hit, and people will say, ‘How did he do it? He must be a genius!”

– Richard Feynman