What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

There was a blind beggar living on the footpath of a street. Suddenly one day, the beggar's brother died. What was the relation of the blind beggar with the person who died?

PS: Brother is not the answer.

Can you solve the maths in the below-given picture equation?

A boy and his father are caught in a traffic accident, and the father dies. Immediately the boy is rushed to a hospital, suffering from injuries. But the attending surgeon at the hospital, upon seeing the boy, says 'I cannot operate. This boy is my son.' How is this situation explained?

What came first, the chicken or the egg?

There is something which is always coming but never arrives?

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

How can you tell a raw egg from a hard-boiled egg?

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

which number am I?