Quantitative Literacy Flashcards

A bar chart shows monthly rainfall: Jan 80mm, Feb 60mm, Mar 100mm, Apr 40mm. What is the average monthly rainfall over these four months?

Answer: 70mm

Average = (80 + 60 + 100 + 40) / 4 = 280 / 4 = 70mm.

A store sells a jacket for $120 after applying a 25% discount. What was the original price?

Answer: $160

The sale price is 75% of the original, so original = $120 / 0.75 = $160.

A car travels 360 km using 30 liters of fuel. How many liters are needed to travel 480 km at the same rate?

Answer: 40 liters

Rate = 360/30 = 12 km/L; liters needed = 480/12 = 40 liters.

A pie chart shows 40% of students prefer science and 35% prefer math. What percentage prefer neither?

Answer: 25%

100% − 40% − 35% = 25% prefer neither subject.

A recipe uses 1.5 cups of flour for 12 cookies. How many cups are needed for 40 cookies?

Answer: 5 cups

Proportion: 1.5/12 = x/40 → x = 1.5 × 40/12 = 5 cups.

A line graph shows a population growing from 20,000 in 2010 to 26,000 in 2020. What is the percentage increase?

Answer: 30%

Increase = 6,000; percentage = 6,000/20,000 × 100 = 30%.

A worker earns $18 per hour and works 45 hours in a week. The first 40 hours are regular pay; beyond 40 hours is paid at 1.5× the regular rate. What is the total weekly pay?

Answer: $855

Regular: 40 × $18 = $720; overtime: 5 × $27 = $135; total = $720 + $135 = $855.