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.

Which wheel of car does not rotate when you turn your car right?

You can move only two matchsticks in the given picture. What is the highest number you can form by doing it?

What number when divided in half becomes zero?

What shoe company does this rebus represent?

You along with your friend are standing in front of two houses. Each of those houses inhabits a family with two children.

Your friend tells you the below two facts:
1) On your left is a family that has a boy who likes accounts but the other child loves science.
2) On the right is a family with a seven-year-old boy and a newborn baby.

You ask him, "Does either of the family have a girl?"

To this, he replies, "I am not quite sure. But can you guess that? If you are right, I will give you $500."

Which family do you think is likely to have a girl?

Which tank will fill first?

Count the Triangle in the figure given below:

You need to move three matchsticks to form three squares. Can you do it?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?