What is the LCM of 18 and 24?

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Answer 1 · 2016-09-28T04:14:28

Multiples of $18$ are ${18,36,54,color(red)72,90,108,126,color(red)144,162,...}$

Multiples of $24$ are ${24,48,color(red)72,96,120,color(red)144,168,...}$

Hence, common multiples are ${72,144,...........}$

and Least Common Multiple is $72$ .

Answer 2 · 2018-06-11T07:12:33

$LCM=72$

Write each number as the product of its prime factors:

The LCM must contain all the factors of each number, but without any duplicates.

$" "18 = 2color(white)(xxxx.x)xx3xx3$
$" "24 = ul(2xx2xx2xx3)$
$LCM = 2xx2xx2xx3xx3 = 72$