Prove that twice of ten is the same as twice of eleven.

Find out the number of circles in the given picture having Illusion

John was piloting a plane behind a car but was never able to overtake it. Why?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

Which Travels Faster? Solve below famous picture riddle:

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?