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Mind-blowing math tricks

2 pilots killed, LaGuardia Airport closed after Air Canada plane collides with vehicle William Shatner turns 95 and gives blunt life advice that keeps him 'smokin' What's the average lifespan of a ...
Think of it as a math trick wearing a magic costume. The sequence of steps — subtract, double, add, food, color — looks like free choice at every stage but isn't. The constraints narrow the ...