Question

Pls do as sum.Thank you!​

Answer 1

Answer:

1)19=19×1

12=2×2×3×1

Common factor =1

2)12=2×2×3

15=3×5

27=3×3×3

Common factor =3

3)Common multiples of 3 and 4

=12, 36, 48

4)Common multiples of 4,5 and 10

=20, 40, 60