Here is a tough mathematical puzzle only for the genius.

This question apparently appeared in UPSC Final Exams held in December 2013 and only 1 person was actually able to solve it.

So the difficulty of this riddle is considered to be “Very Hard”.

[] + [] + [] = 30

Fill the boxes using one of these numbers 1, 3, 5, 7, 9, 11, 13, 15

You can also repeat the numbers.

If you get the correct answer, share it with your friends on WhatsApp, Facebook and other social networking sites.