Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What jumps when it walks and sits when it stands?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

Why is Saturday stronger than Monday?

Who always enjoys poor health?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

A man is surviving on an island along with his friend. They have been starving for four days for food. Suddenly, they find a fisherman. The friend goes with the fisherman in order to catch the fish (if they can find any).

The fisherman returns after some time but he is alone and has some salmon that he had prepared. When asked, the fisherman tells him that his best friend fell off the boat and drowned in the water. Starving for so long, he eats the meal while crying for his friend.

After being rescued, he goes to a diner and orders salmon. When he eats his meal, he jumps and commits suicide. Why did he do it?

A father's child, a mother's child, yet no one's son.

Who am I?

What has 88 keys?