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Question: there are 1000 doors that are of the open-close type. When a person opens the door he closes it and then opens the other. When the first person goes he opens-closes the doors ion the multiples of 1 i.e., he opens and closes all the doors. when the second goes he opens and closes the doors 2, 4 6 8 resly. Similarly when the third one goes he does this for 3 6 9 12 15th doors resly. Find number of doors that are open at last.
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| April 04, 2006 13:05:03 |
#5 |
| simran |
Member Since: Visitor Total Comments: N/A |
RE: there are 1000 doors that are of the open-close ty...
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none of door will be open |
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