# Solve this..

2## Answers

7 + 3 + 7 + 3 + (9 + 1) here is the answer and a many numbers in bracket is called one number

◻➕◻➕◻➕◻➕◻=30

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 Vivek Singh could solve it.

7 + 3 + 7 + 3 + (9 + 1) here is the answer and a many numbers in bracket is called one number

every odd number is of the form :-

2a+1

2b+1

2c+1

2d+1

2e+1

2f+1

2g+1

2h+1

2i+1

I have taken 9 cases because your question has 9 boxes.

Now on adding all of them, we get 2 (a+b+c+d+e+f+g+h+i) + 9 = 2(a+b+c+d+e+f+g+h+i+4) + 1

Hence proved, that it will always yield an odd number.