The LCM is: 28
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The LCM for 4, 7, and 10 is: 140!
For 14, 8, 7, 4 the LCM is: 56
For 7, 5, 4, 3, 2 the LCM is: 420
The LCM is: 84
The least common multiple of 2, 4, and 7 is 28. Two is a factor of 4, so we can ignore it, and 7 is prime, so the LCM is 4 x 7 = 28.