Will someone please help me and explain this?
A very long hallway has 100 lights with pull cords hanging from the ceiling. All the lights are off. A person comes along and pulls every cord, turning on all the lights. A second person comes along and pulls every second cord. This would turn off light numbers 2, 4, 6 etc. A third person comes along and pulls every third cord. Turning on some lights and turning off others. This continues until the one hundredth person comes along and pulls the one hundredth cord. At this point, which lights are on?
hint- 10 lights total are on.
2006-11-16
14:56:39
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6 answers
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asked by
heygirl1914
2
in
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