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

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Mother's Name is Mrs. SIXTY TWO
Son's Name is FIFTY TWO
Daughter's Name is FORTY TWO
What is Name of Father?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

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

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?