Question

Choose the option that lists all factors of 72.

• A. 1, 2, 3, 4, 6, 7 and 9
• B. 2, 3, 4, 6, 12, 24 and 36
• C. 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72
• D. 7, 8, 9 and 72

Answer 1

The correct option is C 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72

Note that 72 can be expressed in the following different ways.

$72=1\times 72$
$72=2\times 36$
$72=3\times 24$
$72=4\times 18$
$72=6\times 12$
$72=8\times 9$

Thus, the factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36 and 72.