Solve this if you are genius

Fill the boxes using
(1, 3, 5, 7, 9, 11, 13, 15)

U can also repeat the numbers.

This question came in UPSC Final Exams held in Dec 2017.

You will be glad to note that only Gaurav Agarwal (IAS Topper) could solve it.

I will give you the answer if it is not solved