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1000 doors

I man open all

II man 2 multiples close

III man 3 multiples open

IV man 4 multiples close

How many doors are open?

Read Solution (Total 1)

31 doors are open which are having numbers as perfect squares.
like 1,4,9,16.......961
12 years agoHelpfull: Yes(1) No(1)

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