Least Common Multiple of 2, 5 and 7 by Listing Multiples

Multiples of 2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, …
Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, …
Multiples of 7: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, …
LCM(2, 5, 7) = 70