There is a wall with 1000 closed lockers on it. A person walks down the hall opening every other locker. Then the next person opens every 3rd locker. The next opens every fourth locker. The next every fifth locker.

Once this has been done, how many lockers are still closed?

if the first person opens the multiptives of 2 and the second multiptives of 3 and so on then the answer is 1,4,9,16,25,36,49,64,81,100,... the perfect squares less than 1000 but i dont have the time to count them but some one esle can

Posted by Anthony on 2002-12-07 04:26:26