Arithmetic Reasoning Flashcards

A worker earns $15 per hour and works 8 hours a day, 5 days a week. How much does she earn in one week?

Answer: $600

$15 × 8 hours × 5 days = $600 per week.

A train travels at 60 miles per hour. How many miles does it travel in 2.5 hours?

Answer: 150 miles

Distance = speed × time = 60 × 2.5 = 150 miles.

A jacket is on sale for $80, which is 20% off the original price. What was the original price?

Answer: $100

$80 represents 80% of the original price, so original = $80 ÷ 0.8 = $100.

If 3 workers can complete a job in 12 days, how many days would it take 4 workers to complete the same job?

Answer: 9 days

Total work = 3 × 12 = 36 worker-days; 36 ÷ 4 workers = 9 days.

A recipe requires 2.5 cups of flour to make 24 cookies. How many cups of flour are needed to make 60 cookies?

Answer: 6.25 cups

Set up a proportion: 2.5/24 = x/60, so x = 2.5 × 60 ÷ 24 = 6.25 cups.

A car uses 6 gallons of gas to travel 150 miles. How many gallons will it need to travel 250 miles?

Answer: 10 gallons

Fuel rate = 6 ÷ 150 gallons per mile; 6/150 × 250 = 10 gallons.

Maria saves $45 per week. How many weeks will it take her to save $540?

Answer: 12 weeks

$540 ÷ $45 per week = 12 weeks.