A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

John was working on a Chemical Mixture whose weight comprise 90% liquid and 10% solid. The total weight of the mixture is 20 pounds. After a while, John noticed that some of the liquid evaporated and now the liquid comprises just 50% of the weight.

What is the weight of the chemical mixture now?

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

A man was just doing his job when his suit was torn. Why did he die three minutes later?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Buy me, smell me or deliver me, I do not change.

Who am I?

What's the only room from which no one can enter or leave

Replace the 'X' with any mathematical symbol to make the expression equal to 111.

18 X 12 X 2 X 3 = 111

What is the riddle which can be asked all day with a different correct answer each time.