What is the average of 12, 18, and 24?

The sum is 54, and 54 ÷ 3 = 18.

A suspect ran 2 blocks north then 3 blocks east. If each block is 100 yards, how far north did he travel?

2 blocks north at 100 yards each is 2 × 100 = 200 yards.

20% of $250 is $50, so the total is $250 + $50 = $300.

Distance equals speed times time: 40 × 2.5 = 100 miles.

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A department has 80 officers and 25% work the night shift. How many work nights?