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The LCM of 12 and 28 is 84.
For small numbers, the easy way is to find the GCF and divide one of them by it, then multiply the result by the other number.
Factors of 12 are [2 2 3]
Factors of 28 are [2 2 7]
GCF=[2] = 4
Divide 28 by 4=7 and 7*12=84.
The proper way (which works for all numbers) is to take the highest power of all factors.
12 is 2^2 * 3^1
28 is 2^2 * 7^1
LCM is 2^2 * 3^1 * 7^1 (since 2^2 is the highest power of 2 in both numbers)
4 * 3 * 7 = 84
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What is the least common multiple of 12 21 and 28?
The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 12, 21, and 28 is 84.
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The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 12, 14, 21, and 28 is 84.
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The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 12, 21, and 28 is 84.
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The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.The least common multiple of 12, 14, 21, and 28 is 84.
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