Mathematics and Arithmetic Flashcards

An officer drives 45 miles in 1.5 hours. What is the average speed in miles per hour?

Answer: 30 mph

Speed equals distance divided by time: 45 ÷ 1.5 = 30 mph.

A suspect's vehicle is described as traveling 60 mph. How many miles does it cover in 20 minutes?

Answer: 20 miles

20 minutes is one-third of an hour, so 60 × (1/3) = 20 miles.

If 3 patrol cars each need 12 gallons of fuel, how many gallons are needed total?

Answer: 36 gallons

Multiply 3 cars by 12 gallons each: 3 × 12 = 36 gallons.

A report lists 240 incidents over 30 days. What is the average number of incidents per day?

Answer: 8

Divide total incidents by days: 240 ÷ 30 = 8 per day.

What is 25% of 160?

Answer: 40

25% equals one-quarter, so 160 ÷ 4 = 40.

An officer collects evidence weighing 3 lbs, 5 lbs, and 8 lbs. What is the total weight?

Answer: 16 lbs

Add the weights: 3 + 5 + 8 = 16 lbs.

A fine is $75 and a 20% surcharge is added. What is the total amount due?

Answer: $90

20% of $75 is $15, so $75 + $15 = $90.