# What is the lowest common multiple of 12 & 21?

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mizoo Share
Mar 16, 2018

$L C M \left(12 , 21\right) = 84$

#### Explanation:

$12 = 1 \times {2}^{2} \times 3$
$21 = 1 \times 3 \times 7$

The LCM will be the product of multiplying the highest power of each prime number together: $1 \times {2}^{2} \times 3 \times 7$

$L C M \left(12 , 21\right) = 84$

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