Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

John has eleven friends. He has a bowl containing eleven apples. Now He wants to divide the eleven apples among his friends, in such a way that an apple should remain in his bowl.
How can He do it?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

Which digit occurred maximum times between the number 1 and 1000?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

A man dies of old age on his 25 birthday. How is this possible?

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?