Question

Which of the following is not a factor pair of 78?

• A. 2 and 39
• B. 4 and 26
• C. 6 and 13
• D. 3 and 26

Answer 1

The correct option is B 4 and 26

2 $\times$ 39 = 78
So, 2 and 39 is the factor pair of 78.

4 $\times$ 26 = 104
So, 4 and 26 is not the factor pair of 78.

6 $\times$ 13 = 78
So, 6 and 13 is the factor pair of 78.

3 $\times$ 26 = 78
So, 3 and 26 is the factor pair of 78.

Therefore, 4 and 26 is not the factor pair of 78.