Question

3rd common multiple of 6, 9, and 15​

Answer 1

Step 1 :

List  out factors of 6, 9 and 15.

$6-3*2*1\\9-3*3*1\\15-1*3*5$

Step 2 :

Get the HCF of 6,9 and 15.

$3*3*2*5*1=90$

Step 3 :

The the third common multiple must be third multiple of 90.

$90*3=270$

∴ 270 is the third common multiple of 6, 9 and 15.

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