Which number should replace the question mark?

What has 88 keys?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Which is heavier: a ton of bricks or a ton of feathers?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

A blonde put eyeliner on her head. Why?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

I always drive my customer away.

Who am I?

Which is the smallest number that you can write using all the vowels exactly once?