Because the LCM of 12 and 56 is 168 and 336 is the next common multiple
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The lowest common multiple of 7 and 12 is 84. Therefore, the multiples of 7 and 12 are multiples of 84. The first five are: 84 168 252 336 420
Multiples of 12 are 12, 24, 36, 48, 60, 72, 84... Multiples of 42 are 42, 84... Two common multiples of 12 and 42 are 84 and 168. The Least Common Multiple of 12 and 42 is 84.
The least common multiple of 12, 14, and 16 is 336.You can determine this by looking at the multiples of each number individually and seeing when they match:12: 12, 24, 36...33614: 14, 28, 42...33616: 16, 32, 48...336
The least common multiple of 12 , 16 , 14 = 336
Since the LCM is 12 then the common multiples are multiples of 12 12, 24, 36, 48