2 and 15
10 and 15
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5,65,7
1 and 30 is one possible answer.
4 and 9 22 and 23 37 and 53
There are many common multiples of 120 and 149. A common multiple is simply a multiple of both numbers. The least common multiple is 120x149, since 149 is prime. (Note: this trick doesn't work on all pairs of number. Although the product is always a multiple, it's not the least common multiple.)
24 and 48 have the LCM of 48 3 and 16 have the LCM of 48