40 + 44 = (10 x 4) + ( 11 x 4) = 21 x 4 = 84
9(2 + 3)
3 (21+5)
11(5 + 6)
5(8 + 5)
9(2 + 3)
This question requires more information in order for it to make any sense at all! You cannot have a sum of a number: you need two or more numbers. A single number cannot have a GCF. The GCF needs to be COMMON to two or more numbers.
The GCF of 75 and 90 is 15.
4 x 13
The set of numbers given are not suited for this since 9 and 35 are co-prime so that the GCF of the given set of numbers is 1. Using a GCF of 1 does not help.
It requires you to express the sum as the product of the GCF and, in parentheses, the sum of the two numbers divided by their GCF.So, for example,36 + 24 = 12*(3 + 2).
9(2 + 3)
7(7 + 9)