Question

One box can hold 8 chalks. Two boxes can hold nearly ___ chalks.

• A. 10
• B. 20
• C. 8
• D. 25

Answer 1

The correct option is B 20

One box can hold 8 chalks.

$\therefore$ Two boxes can hold $2\times 8=16$ chalks. But, 16 is closer to 20.

$\therefore$ Two boxes can hold nearly 20 chalks.

Or, in other words, $2\times 8=16$ is best estimated by $2\times 10=20.$