Question

Anna is helping in a race as a volunteer. She has a carton with 20 juice cans.
She takes out the juice cans and arranges them on a table in a rectangular arrangement.
Find the number of different arrangements Anna can make.

• A. 8
• B. 6
• C. 3
• D. 10

Answer 1

The correct option is B 6

Number of juice cans = 20

To find the number of different arrangements, let us find the factor pairs of 20.
Factor pairs of 20 are:

$1\times 20$:

$20\times 1$:


$2\times 10$:


$10\times 2$:


$4\times 5$:


$5\times 4$:

Thus, Anna can arrange 20 juice cans in 6 ways.