Question

What is the lowest common multiple of 12 & 21?

Answer 1

`LCM (12, 21) = 84`

Explanation:

`12 = 1 xx 2^2 xx 3`
`21 = 1 xx 3 xx 7`

The LCM will be the product of multiplying the highest power of each prime number together: `1 xx 2^2 xx 3 xx 7`

`LCM (12, 21) = 84`