Solve this..
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 '13...... You will be glad to note that only Gaurav Agarwal could solve it.

how is it possible tell me the answer if gaurav agarwal can do it


The sum of five odd numbers is always odd...hence it is impossible to get 30 by adding odd numbers odd times.