The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Why do we preferably have round manhole covers and not square ones?

A man was going to bleach his socks because they had gotten muddy the day before. As he was pouring the bleach into the washing machine, he spilt some on the floor. He got some cleaning fluid and mopped it up with a rag. Minutes later he was dead. What killed him?

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

What word is represented by this rebus?

What is the word or phrase?

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?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

A man is looking at a photograph of someone. His friend asks who it is. The man replies, “Brothers and sisters, I have none. But that man’s father is my father’s son.” Who was in the photograph?