Question

Please help with picture above.

Answer 1

1,5

Explanation:

Common factor is just 1 and 5.

Answer 2

1, 5

Explanation:

The shaded area denotes the common factors of 50, 40 and 15

factors of 50 : 1, 2, 5, 10, 25, 50

factors of 40 : 1, 2, 4, 5, 8, 10, 20, 40

factors of 15 : 1, 3, 5, 15

common factors of 50, 40, 15 : 1, 5