Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

If 1+9+8=1, what is 2+8+9?

What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

I look at you, you look at me, I raise my right, you raise your left. What am I?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

What number when divided in half becomes zero?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?