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

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Asked by Neha on 25 Mar 2023


Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

Asked by Neha on 13 Aug 2025

An ape is trying to climb on a pole that is 60 feet high. Due to the slippery surface, the ape climbs 3 feet in a minute only to slip back 2 feet.

How much time do you think the monkey will take to reach the top of the pole?

Asked by Neha on 29 Sep 2024


Which English verb becomes past tense just by rearranging the letters?

Asked by Neha on 07 Sep 2025

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

Asked by Neha on 04 Oct 2023

On a bright sunny day, two fathers took their son fishing in the lake. Each man and son were able to catch one fish. When they returned to their camp, there were only three fishes in the basket. What happened?

PS: None of the fish were eaten, lost, or thrown back.

Asked by Neha on 05 Mar 2023


One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Asked by Neha on 03 Jan 2025

What word does this rebus represent?

meta meta
meta meta

Asked by Neha on 11 May 2021

81 x 9 = 801. What must you do to make the this equation true?

Asked by Neha on 03 Oct 2021


Spot the cat in the picture below

Spot the Cat

Asked by Neha on 11 Apr 2021

Hot Articles

Amazing Facts

Jigsaw puzzles

Jigsaw puzzles soared in popularity during the great depression, as they provided a cheap, long-lasting, recyclable form of entertainment.