During which month do people sleep the least?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

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?

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?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

A girl says this to her best friend: “I was born in 1955, and I celebrated my 17th birthday last weekend.” Her best friend thinks she’s lying, but she’s actually correct. How is that possible?

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?

Give it food and it will live; give it water and it will die.