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?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?