How many times in a given day, minutes and hour clock comes in a straight line ?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

What has to be broken before you can use it?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

How many Watermelons are there in the below picture?

What can you hold in your right hand, but never in your left hand?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?