NO!!! '7' is a FACTOR of '42'.
However, '42' is a multiple of '7'.
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It is not possible to give a sensible answer to this question. The least common multiple (LCM) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question!
126
the answer would be 49 because if you add 7 to, 42 that equals 49 42+7=49
The common multiples of 7, 14, and 21 are the infinite set of multiples of their least common multiple, which is 42. So the common multiplesof 7, 14, and 21 are 42, 84, 126, 168, and so on.Any multiple of 42.
The LCM of 23 and 7 is 161. The LCM of 2, 3 and 7 is 42.