What is the word or phrase?

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

What does the below mathematical rebus mean?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What will you call your mother's brother's brother-in-law?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

The Little ant seems to be always confused. Do you know why?

Suppose you are sitting in an interview and the interviewee asks you an aptitude question.

You have three buckets with a capacity of 4 litres, 8 litres and 10 litres and you have a large tank of water. Now you have to measure 3 litres of water precisely using those buckets. How will you do it?

Christina is practising her dance steps along with her friends. In a particular sequence, all of them form a row. At that point, Niharika is standing in the 4th position from either end of the row.
Can you find out how many girls are practising together?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?