The LCM is 840.
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The LCM of 40 and 56 and 60 is 840.
The LCM is: 840
The LCM is 840.
To find the least common multiple (LCM) of 21, 42, and 56, first find the prime factorization of each number. 21 = 3 x 7 42 = 2 x 3 x 7 56 = 2 x 2 x 2 x 7 Then, identify the highest power of each prime factor that appears in any of the factorizations. LCM = 2^3 x 3 x 7 = 56 x 3 x 7 = 1176 Therefore, the least common multiple of 21, 42, and 56 is 1176.
The LCM is: 56