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 ?

In the city of Brain Teasers, 5% of people do not list their phone numbers. Now if we select random 100 people from the phone directory, then how many people selected will have unlisted phone numbers?

John was piloting a plane behind a car but was never able to overtake it. Why?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

If 21x = 79x, what is the value of x?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

What Adam and Eve do not have but the rest of the people have?

What is red and smells like blue paint?

What's a single-digit number with no value?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?