1. Student #7 starts with Locker 7 and changes every seventh door
The Locker Problem
Student #7 starts with Locker 7 and changes every seventh door
Student #10 starts with Locker 10 and changes every tenth door
Student #4 starts with Locker 4 and changes every fourth door
Student #8 starts with Locker 8 and changes every eighth door
Student #9 starts with Locker 9 and changes every ninth door
Student #2 starts with Locker 2 and closes every second door
Student #6 starts with Locker 6 and changes every sixth door
Student #3 starts with Locker 3 and changes every third door
Student #5 starts with Locker 5 and changes every fifth door
Student #20 starts with Locker 20 and changes it
Student #18 starts with Locker 18 and changes it
Student #17 starts with Locker 17 and changes it
Student #16 starts with Locker 16 and changes it
Student #19 starts with Locker 19 and changes it
Student #12 starts with Locker 12 and changes it
Student #11 starts with Locker 11 and changes it
Student #13 starts with Locker 13 and changes it
Student #14 starts with Locker 14 and changes it
Student #15 starts with Locker 15 and changes it
Student #1 opens every locker door 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 1 2 2 1 3 2 1 1 2 1 3 4 2 1 2 4 3 1 2 3 2 1 4 2 3 1 1 2 5 6 3 1 2 4 1 2 2 1 4 3 1 2 4 3 5 3 2 1 4 2 1 5 1 3 2 6 4 1 2 2 4 6 3 5 1