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What is is the least common multiple of 12 and 21?

Updated: 10/17/2024

Wiki User

∙ 11y ago

Best Answer

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=2x2x3

21=3x7

lcm=2x2x3x7=84
The Least Common Multiple (LCM) for 12 21 is 84.

Wiki User

∙ 7y ago

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More answers

Wiki User

∙ 15y ago

LCM of 21 & 12 is 84.

Wiki User

∙ 14y ago

Least common multiple 12 and 21 is 84.

Wiki User

∙ 11y ago

84

Wiki User

∙ 14y ago

84.

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