Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

Why do you find that most of the buildings are deprived of the 13th floor?

You can see it everyday, But cannot touch it at will. What is it?

Prove that twice of ten is the same as twice of eleven.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

A father's child, a mother's child, yet no one's son.

Who am I?