What Time Should the last watch show in the below figure?

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

How can you write nineteen in a manner that if we take out one, it becomes twenty?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?