Principal in the School

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Principal in the School




Similar Riddles

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Asked by Neha on 13 Sep 2021


By what process could you make a 'Tea-Table' into food?

Asked by Neha on 16 Aug 2023

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

Asked by Neha on 26 Apr 2023


What number comes next in the series?

5 15 5 18 5 24 14 20 _

Asked by Neha on 15 Jun 2023

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

Asked by Neha on 18 Sep 2025

When is the top of a mountain similar to a savings account?

Asked by Neha on 18 Aug 2025


What runs around the whole yard without moving?

Asked by Neha on 14 May 2021

You need to remove two matchsticks to make the below equation true. Can you do it ?

Equation Correction Riddle

Asked by Neha on 06 Feb 2026

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Asked by Neha on 09 Apr 2025


What is the next shape from answers A, B, C, and D figure?

Next Shape Riddle

Asked by Neha on 20 Jan 2024

Hot Articles

Amazing Facts

Gambling

In Canada, a mathematical puzzle must be solved in order to win the lottery to classify it as a “game of skill” not gambling.