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

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Asked by Neha on 11 Jun 2025


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

Asked by Neha on 16 Aug 2023

Can you write down eight eights so that they add up to one thousand?

Asked by Neha on 02 Apr 2022


If eleven plus two equals one, what does nine plus five equal?

Asked by Neha on 28 Mar 2022

In a fruit store, there was a unique weighing machine that was made to weigh only cherries and strawberries as they were priced the same.

Other fruits like watermelons or mango had different machines as they were expensive.

A man successfully buys watermelons at the price of cherries. How?

Asked by Neha on 30 Apr 2023

Create a number using only the digits 4,4,3,3,2,2,1 and 1. So i can only be eight digits. You have to make sure the ones are separated by one digit, the twos are separated by two digits the threes are separated with three digits and the fours are separated by four digits

Asked by Neha on 16 Sep 2021


What is the difference between a jeweller and a jailer?

Asked by Neha on 11 Jul 2025

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

Easy Movie Rebus Riddle

Asked by Neha on 11 May 2021

How many triangles can you find in this given picture?

Count the Triangles

Asked by Neha on 27 Feb 2023


Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Asked by Neha on 14 Mar 2022

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.