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To find the Least Common Multiple (LCM) of 18, 30, and 42, we first need to find the prime factorization of each number.
18 = 2 * 3^2 30 = 2 * 3 * 5 42 = 2 * 3 * 7
Then, we take the highest power of each prime factor that appears in any of the numbers.
2^1 * 3^2 * 5^1 * 7^1 = 2 * 3^2 * 5 * 7 = 630
Therefore, the LCM of 18, 30, and 42 is 630.
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