Question

Xx+Xx+Xx=30 Fill The Box Using (1,3,5,7,9,11,13,1 5)

Answer 1

i)   3!+1+3+13+7=30              [ If we solve by factorial method]
ii)   3!+3!+3!+3!+3!=30
     [3!=3×2×1=6]

[without factorial method]
Odd nos added for odd nos. of time will always give an ODD NUMBER.
Odd nos added for even no of time will give an EVEN NUMBER.

Answer 2

The answer is
(15 – 9) + (13 – 7) + (7 – 1) + (9 – 1) + (13 – 9)If you calculate it, you will get
6 + 6 + 6 + 8 + 4 = 30