The LCM is 42.
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42
Least Common Multiple (LCM) for 7 14 42 is 42.
For the values: 21, 14 the LCM is: 42
The prime factorization of 42 is 2 x 3 x 7 Therefore the ascending sequence of numbers who could have a LCM of 42 is 2, 3, 6, 7, 14, 21 Pick the two which add to 20 6 + 14
Using the prime factors of 14 and 6, the LCM is 42 (2 x 3 x 7).