Find LCM of $9$ and $18$ .

81

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28

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12

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18

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Solution

The correct option is D $18$ .
We have to find the L.C.m of $9$ and $18$ .
Now.Write the given number in their form of multiples
$9 = 3 \times 3$
$18 = 2 \times 3 \times 3$
Hence,
L.C.M= $2 \times 3 \times 3$
$= 18$
Hence, L.C.M of $9$ and $18 = 18$

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