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To find the LCM, first, find the prime factorization of each number:

280 = 2 * 2 * 2 * 5 * 7

392 = 2 * 2 * 2 * 7 * 7

Group the like prime factors (the ones in bold italics)

2 * 2 * 2 * 5 * 7 * 7 = 1960

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Q: What is the LCM of 280 and 392?
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