What does this below rebus puzzle mean?

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

You can see three almost identical images below. Can you spot the odd one out from them?

Replace the question mark with the correct number.

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Can you find out who is the kidnapper in below Picture and why, Explain ?

What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

Take one out and scratch my head, I am now black but once was red. What am I?

I always drive my customer away.

Who am I?