How can a man go eight days without sleep?

Complete the table series riddle by finding the number that can replace "??".

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

How is a fly different from a mosquito?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Today is a very icy and cold morning in Newcastle. Mr Shearer, an office bus driver arrived to pick up the employees from the last stop. Shearer suddenly remembers that he needs to pick a newly joined 4miles to the north. Mr Shearer lost his direction compass, a few minutes later Shearer is able to figure that he is moving in the correct direction i.e. north. How did Shearer know that he is moving in the correct direction?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?