Question

Please answer the question below There is a hallway with 5 closed doors. A man is walking 5 times through that hallway, first from the beginning to the end. Second, he returns from the end to the beginning. Third, again from beginning to the end and so on. First time he opens every door, second time - every second door, third time - every third door, and so on. If the door is already open, man closes it instead. How many doors will be closed at the end?

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

10 closed doors

Explanation:

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