Answer:
60 and 120
Explanation:
The LCM of 12 and 15 is 60
The smallest natural number that would be a multiple of 12 and 15 would be 60.
To find the second number, all you do is multiply 60 by 2 and you get 120.
(60 * 2 = 120)
180 and 420
The greatest common factor of 12 and 15 is 3, so the least common multiple will be (12)(15)/3 = 60.
Any natural number multiple of 60 will be an answer to your question. For multiples 3 and 7, your two numbers are 180 and 420.
180 = 12 × 15
420 = 12 × 35 = 15 × 28
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