No.
The answer is 7. 7 x 3 = 21 7 x 7 = 49
The greatest common factor of 42, 49 and 84 is 7.
9 = 3 x 3 16 = 4 x 4 25 = 5 x 5 36 = 6 x 6 49 = 7 x 7
7 (7 x 3= 21, 7 x 7=49)
1 x 147, 3 x 49, 7 x 21
The greatest common factor of 21 and 49 is 7.21 = 3 x 7, 49 = 7 x 7 so GCF = 7.
Factor tree for 49:49/ \7 x 7497,7
Either {3,16} or {1,48} will satisfy this. If I understand the question: 3 x 16 = 48, 3 + 16 = 19 (odd), and then 1 x 48 = 48, 1 + 48 = 49 (odd)
The greatest common factor of 9 (3 x 3) and 16 (2 x 2 x 2 x 2) is 1.
1 x 49, 7 x 7, 49 x 1
(x - 16)(x + 3)
Factor them. 2 x 2 x 3 = 12 2 x 2 x 2 x 2 = 16 2 x 3 x 3 = 18 Select the common factor. The GCF is 2.