What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

In a university, a professor gave a set of three problems to the three brilliant students of his class. See the image for the questions.

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

A farmer and his neighbour once went to Emperor Akbar"s court with a complaint. "Your Majesty, I bought a well from him," said the farmer pointing to his neighbour, "and now he wants me to pay for the water."
"That"s right, your Majesty," said the neighbour. "I sold him the well but not the water!"?
The Emperor asked Birbal to settle the dispute. How did Birbal solve the dispute?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

You can see it everyday, But cannot touch it at will. What is it?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?