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25 December, 14:55

Suppose you're in a hallway lined with 100 closed lockers. You begin opening every locker. Then you close every second locker. Continue toggling every nth locker on pass number n. After 100 passes, where you toggle only locker #100, how many lockers are open and what are those locker numbers? Construct a visual display showing how you derived your answer. Explain any patterns you see in your answer.

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  1. 25 December, 18:14
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    50 Lockers and every even locker up to 50 numbers
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