Scroll down for the answer to the facebook riddle/puzzle

10 Unsolvable Math Questions
Question 1 of 10
Kate travelled 172 kilometres by train and then 22 kilometres by car. How far did she travel altogether?
Question 2 of 10
What is the difference between 1,000 and 3,000?
Question 3 of 10
What is half of 102, plus 20?
Question 4 of 10
12 plus what equals 56?
Question 5 of 10
A foot is equivalent to how many centimetres?
Question 6 of 10
What maths tool is used to draw circles?
Question 7 of 10
What is the name of the straight line passing through the centre of a circle?
Question 8 of 10
How many in a quintet plus a trio?
Question 9 of 10
What is LII in Roman numerals
Question 10 of 10
Scalene is used to describe which sort of shape?

Answer riddle/puzzle:

the answer is 33