What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

There is a movie name hidden in the picture that is attached with this question. Can you find out which movie is it?

How can a man go eight days without sleep?

What is both possible and impossible at the same time?

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain