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Earn +20 ptsQ: What is the LCM of 21 and 12?
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What is is the least common multiple of 12 and 21?
The LCM of 12 and 21 is 84. To find the LCM, prime factor both numbers then multiply each factor the most times it was used in either number.12=2x2x321=3x7lcm=2x2x3x7=84The Least Common Multiple (LCM) for 12 21 is 84.
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