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 breaks yet never falls, and what falls yet never breaks?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

Name a key which is hardest to turn.

It has horns but can’t beep. It is like to bleat but It is not a sheep. What is it?

Rearrange the letters in "new door" to make one word.