A number theory problem by Matthew Tam
Number Theory
Level
pending
In a school of 1000 students, the 1st student opens all lockers, the 2nd student changes the state of every 2nd locker, the third changes the state of every third locker and so on until all 1000 students have went. How many are open after?
The answer is 31.
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1 solution
Its very simple that only squares no. Will have odd no of factors