The more it dries, the wetter it becomes. Can you tell what it is?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

Move three sticks of the spiral below to form a square.

In a mathematical quiz, you are asked the following question:

Use three 9s in a mathematical expression without dividing or multiplying to form the number one.

Can you answer the question?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

Can you find out the missing number in the grid?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

By what process could you make a 'Tea-Table' into food?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?