How do you find the LCM of 27, 18?

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Answer 1 · 2016-12-09T11:02:02

$lcm (18, 54) = 54$ $lcm(18,54)=54$

method 1

list multiples of the two numbers and pick out the common ones.

multiples $18:{18,36,54,72,90,108....}$

multiples $27:{27,54,81,105,142,....}$

$lcm(18,54)=54$

method 2

use: $" "axxb=hcfxxlcm$

$18xx27=9xxlcm$

$lcm=(cancel(18)^2xx27)/cancel(9$

$lcm=2xx27=54$