When we see 2 but call 10?

I always drive my customer away.

Who am I?

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

I am white when I am dirty, and black when I am clean. What am I?

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

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

If eleven plus two equals one, what does nine plus five equal?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What does it mean?