20
How about 7*7 = 49 because 4+9 = 13
6 + 7 = 13(Sum means add)
Well since an equation has an equal sign it is 6+7=13
10 + 3 = 13 10 - 3 = 7
The sum of 13/16 and 7/16 is 1 1/4
The sum of 7 & 13 = 7 + 13 = 20
19
1+4+7+10+13+16= 51 (Why don't u check your calculator)
The answer is 13.
It is 6+7 = 13.
SUM means plus 4+7=11