40 is the LCM of which two numbers?

Question

20 and 60
40 and 80
10 and 40
5 and 20

8 is the GCF of what two numbers?

24 and 48
14 and 32
16 and 28
16 and 56

Answer 1

40 is the LCM of which two numbers?
10 and 40

8 is the GCF of what two numbers?
16 and 56

Answer 2

kyle = Jim

Why did you post this if you already knew the answers?