Posted by **kiki** on Monday, May 14, 2007 at 8:06pm.

there are lockerslined up numbered 1 to 1000.They are all closed . i walk by and open all the lockers . then Al walks by and goes to every second locker starting at #2and closes it. Then Mary goes to every third locker starting with #3 closing the opeaned lockers and opening the closed lockers. The n Jose walks by and goes to every fourth locker starting at #4 closing the opened locker and openining the closed lockers. this rutine goes on untile eviline goes to locker 1000 and closes it . After this is over which lock ers will be open?why?

I don't remember the answer and I'm not necessarily going to sit down and figure this out. BUT....I will give you a hint I THINK is a correct hint:

Think about prime numbers.

I apologize if it's not. But my dad gave me this question (or a similar one) years ago and I think I remember that being part of the answer.

Matt

## Answer This Question

## Related Questions

- Math 6th - Imagine there are 1000 lockers and 1000 students at school. The 1st ...
- math - 1000 lockers 1000 students, the first student goes along and opens every ...
- ALEGEBRA - The new school has exactly 1000 students and 1000 lockers.On the ...
- math - the 20 students in Mr. Wolf's 4th grade class are playing a game in a ...
- math - A set of 100 open lockers are numbered from 1 - 100. Sarah comes by and ...
- Math - Newon Middle School has a hall with 500 lockers, all of which are closed...
- algebra - the new school has exactly 1000 lockers and 1000 students. on the ...
- Math - A new school has exactly 1,000 lockers and 1,000 students. the student ...
- algebra - the new school has exactly 1000 lockers and 1000 students. on the ...
- geometry - At Millock Highschool, there are 1,000 lockers and 1,000 students. ...

More Related Questions