Source google image: http://w.brainfans.com/brainteasers/brain-teaser-number-maths-puzzles-math-riddle-with-answer-51693393588113a497bd56.23762726.png
Puzzle ans
Source google image: http://w.brainfans.com/brainteasers/brain-teaser-number-maths-puzzles-math-riddle-with-answer-51693393588113a497bd56.23762726.png