Question

What is the sum of the first and second common multiples of $4$ and $6?$

• A. $36$
• B. $144$
• C. $72$
• D. $288$

Answer 1

The correct option is A $36$

Multiples of $4$ $:$ $4,8,12,16,20,24,28,32,36,40,44,\mathrm{48....}$

Multiples of $6$ $:$ $6,12,18,24,30,36,42,48,54,60,66,\mathrm{72...}$

$\Rightarrow$ First and second common multiple of $4$ and $6$ $:$ $12,24$

$\Rightarrow$ Sum of first and second common multiple of $4$ and $6$ $=12+24$

$=36$