13
The answer is 13.
Sum of 9 and 4 = 13 Difference of 9 and 4 = 5 Product = 13 x 5 = 65.
9 and 13 9 and 13
They are 9 and 13.
The expression is -9 + 13 + 12
13 and 9 13+9=22 13-9=4
5
13
13
Add them up. The factors of 9 are 1, 3 and 9. The sum of the factors is 13.
The sum of the positive odd factors of 36 is 13 (1 + 3 + 9 = 13).