The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.
The least common multiple of 40 and 60 is 120.
120
Factor them.
2 x 2 x 2 x 5 = 40
2 x 2 x 3 x 5 = 60
Select the highest amount of each factor.
2 x 2 x 2 x 3 x 5 = 120, the LCM
The Least Common Multiple of 40, 60: 120
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The least common multiple of the numbers 8, 60 and 40 is 120.
The least common multiple of the numbers 30, 40 and 70 is 840.
1080
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].. 4: 4,8,12,16,20,24,28,32,36,40,44,48,52,56,[60]... 6: 6,12,18,24,30,36,42,48,54,[60]... 10: 10, 20, 30, 40 ,50, [60]... the least common multiple of these numbers is 60
The Least Common Multiple of 60 and 12 is 60.