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Curated by: Mathematical Visual Proofs (650 videos)
100 Lockers Riddle Here’s a classic number theoretic riddle often called the Locker Problem. All lockers begin closed. Pass 1: change the condition of every locker (open them) Pass 2: change the condition every 2nd locker (close them) Pass 3: change the condition every 3rd locker (open are closed and closed are opened) ... Pass m: change the condition of every mth locker (open are closed and closed are opened) Continue to pass 100. Only some lockers are left open: which ones? Can you explain why the open ones are the only ones? What’s the hidden number theory? #mathvisualproofs #math #visualmath #numbertheory #mathematics #puzzle #lockerproblem