The 1st student starts with the 1st locker, and while going down the hallway, opens all the lockers.
How many lockers did the first student open? _______ lockers
The 2nd student starts with the 2nd locker, and while going down the hallway, shuts every other locker.
How many lockers did the 2nd student close? _______ lockers.
The 3rd student stops at every 3rd locker and opens the locker if it is closed or shuts the locker if it is open.
How many lockers did the 3rd student open? _______ lockers
How many did the 3rd person close? _______ closed
The 4th student stops at every 4th locker and opens the locker if it is closed or shuts the locker if it is open.
How many lockers did the 4th student open and close?
The 5th student stops at every 5th locker and opens the locker if it is closed or shuts the locker if it is open.
How many lockers did the 5th student open and close?