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.

Can you divide the below-given shape into four equal and identical pieces?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

If eleven plus two equals one, what does nine plus five equal?

You visit a home for specially-abled children on the occasion of Christmas where you meet with 50 children. You have a box of chocolates containing 50 chocolates exactly.

What if you were asked to one chocolate to each child in a manner that one chocolate still remains in the box? Is it possible?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you find the missing piece of the Porsche?

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?