Question

Find a common multiple between 30 and 42 that is bigger than them.

(Note: I'm not finding the LCM I just need a multiple bigger than them)

Answer 1

1260

1260 is a multiple of 30 and 42.
30(42)=1260,
multiplying both of these numbers means that the result will always be a common multiple.

Answer 2

210

Explanation:

GCF(30,42) = 6

LCM(30,42) = ( 30 × 42) / 6

LCM(30,42) = 1260 / 6

LCM(30,42) = 210