I look at you, you look at me I raise my right, you raise your left. What am I?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

There is a place where if I stand up straight, I will still be considered sideways.

What brings you down but never up?

Which word does the below Plexor means ?

If eleven plus two equals one, what does nine plus five equal?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

How can I get the answer 24 by only using the numbers 8,8,3,3?

You can use the main signs add, subtract multiply and divide.