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The LCM is the product of factors of all the numbers to their highest powers.

Prime factors of 9 are 32

Prime factors of 14 are 2 x 7

Prime factors of 42 are 2 x 3 x 7

The LCM of 9, 14, and 42 is 126 (2 x 32 x 7)

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Q: Find the least common multiple of 9 and 14 and 42?
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