Can you replace the question mark with the correct number?

Which of the below owl is odd one out?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

What Does this text mean:

important=important

What 5-letter word typed in all capital letters can be read the same upside down?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

I travel all around the world but always stay in the corner. What am I?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What is the end of everything?

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?