Question

What are the three common multiples of $18$ and $6$?

• A. $18,6,9$
• B. $18,36,6$
• C. $36,54,72$
• D. none of these

Answer 1

The correct option is C $36,54,72$

Multiples of $18=18,36,54,\mathrm{72.....}$

Multiples of $6=6,12,18,\mathrm{24....}$
The first common multiple will be $18$

And the next common multiples will be multiples of $18$
Hence, the common multiples of $18,6$ are $18,36,54,72$...