How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

What jumps when it walks and sits when it stands?

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

What is the next number in this matchsticks series riddle?

There is a wide field of corn. A goose finds its way into the field and starts running. Can you find out till which point the goose can run into the field?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I always drive my customer away.

Who am I?

what's the probability of getting a king or a queen from a pack of 52 cards?

Spot 5 differences in two Christmas tree below: