Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

You enter your friend's room. He is not in his room. Although you see that on the bed there are two dogs, five cats, two giraffes and three pigs. Also, a couple of chickens and ducks are flying in the room.

Calculate the number of legs standing on the floor.

Count the squares in the matchstick puzzle below?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

When monkey rotate the gear, which mark will be hit 1 or 2 ?