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Do a prime factorization of both...

28 = 2x2x7

60 = 2x2x3x5

Use the common factor only once and the other factors

(2x2) is common to both ... use this only once

( 2x2)x7x3x5 = 420

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12y ago

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Q: How do you find the least common multiple of 28 and 60?
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