Which is a factor of this sum? (4 x 2) + (8 x 2)

A factor divides a number evenly, leaving no remainder.

• Is 7 a factor of 24? $24 \div 7 \approx 3.43$ (not an integer)
• Is 12 a factor of 24? $24 \div 12 = 2$ (yes, it is an integer)
• Is 21 a factor of 24? $24 \div 21 \approx 1.14$ (not an integer)
• Is 16 a factor of 24? $24 \div 16 = 1.5$ (not an integer)

Only 12 divides 24 evenly.

The correct option is 12.
$\text{12}$