Find L.C.M. :
$21, 24$

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Solution

LCM of $21, 24$ is the smallest number among all common multiples of $21, 24$
By common division method,
$L C M (21, 24) = 2 \times 2 \times 2 \times 3 \times 7 = 168$
Hence, $L C M (21, 24) = 168$

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