What has hands, but can’t clap?

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

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Find the number of squares in the below picture

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Find the next number in the sequence

1, 2, 6, 21, 88, __?