Which number should replace the question mark?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

What work can one never finish?

What goes up but never comes down?

At a Society election for president, precisely 963 votes were cast.
There is a total of 4 candidates that participate in the election.

The winning candidate exceeds the opponents by 53, 79 and 105 votes.

How many votes do each candidate gets?

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

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

What does Alexander the Great and Winnie the Pooh have in common?

Can you write down eight eights so that they add up to one thousand?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?