What kind of storm is always in a rush?

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?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

I always drive my customer away.

Who am I?

The centre of the third figure is empty. What digit should fit inside?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Remove two matchsticks to make the below equation correct.

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Find the next number in the series below.

6 18 270 72090 ?

Samuel was out for a walk when it started to rain. He did not have an umbrella and he wasn't wearing a hat. His clothes were soaked, yet not a single hair on his head got wet. How could this happen?