81 x 9 = 801. What must you do to make the this equation true?

John can eat 27 chocolates in an hour, Jacob can eat 2 chocolates in 10 minutes, and Jolly can eat 7 chocolates in 20 minutes. How long will it take them to share and eat a box of 120 chocolates whilst playing Chess?

Take away the whole and some still remain. What is it?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

Solve the puzzle by telling what does below picture means.

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Complete the table series riddle by finding the number that can replace "??".

How is the moon similar to a dollar?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M