Question

Find the first four common multiples of the following :

$3$ and $4$.

• A. $24,28,32,36$
• B. $24,27,33,36$
• C. $12,24,36,48$
• D. $12,15,20,24$

Answer 1

Answer: (C)

$12,24,36,48$

Multiples of $3=3,6,9,12,15,\mathrm{18..}$
Multiples of $4=4,8,12,16,\mathrm{20..}$
The first common multiple will be $12$
And the next common multiples will be multiples of $12$
Hence, first four common multiples of $3,4$ are $12,24,36,48$