What is the locker problem answer?

Answer 1

i have to do this in my creative math class and i figured it out. the first locker will stay open. then there will be two closed. one open then four closed. one open the 6 closed one open 8 closed. it goes on like 2 4 6 8 so on and so on. but make sure between every closed one there is an open one.

Answer 2

It basically the square root. 1x1=1, 2x2=4, these lockers were left open.