It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

A man was driving a black truck. His lights were not on. The moon was not out. A lady was crossing the street. How did the man see her?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Solve the puzzle by telling what does below picture means.

Using eight eights and addition only, can you make 1000?

John was drowned by he was not wet. How?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?