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NBT Quantitative Literacy: Ratios, Proportions and Rates Flashcards

7 cards from real NBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 NBT Quantitative Literacy: Ratios, Proportions and Rates flashcards as text

  1. A store offers 15% off the original price of R480. What is the sale price?

    Answer: R408

    Discount = 0.15 × 480 = R72; sale price = 480 − 72 = R408.

  2. Train A travels at 90 km/h and Train B travels at 60 km/h. If Train A departs at the same time as Train B, how much further has Train A travelled after 2.5 hours?

    Answer: 75 km

    Train A: 90 × 2.5 = 225 km; Train B: 60 × 2.5 = 150 km; difference = 75 km.

  3. Concrete is mixed using cement, sand, and gravel in the ratio 1:2:4. How many kg of sand are needed to make 280 kg of concrete?

    Answer: 80 kg

    Total parts = 1+2+4 = 7; sand = (2/7) × 280 = 80 kg.

  4. A school spent R9 600 on textbooks for 120 students. At this rate, how much would textbooks cost for 85 students?

    Answer: R6 800

    Cost per student = 9 600 ÷ 120 = R80; cost for 85 = 80 × 85 = R6 800.

  5. A car uses 9 litres of fuel per 100 km. How many litres are needed to travel 350 km?

    Answer: 31.5 litres

    Fuel = (9/100) × 350 = 31.5 litres.

  6. A box contains blue and red marbles in the ratio 3:7. There are 42 red marbles. How many marbles are in the box in total?

    Answer: 60

    If 7 parts = 42, then 1 part = 6; total = 10 parts = 60.

  7. A swimming pool holds 80 000 litres and is filled by two pumps. Pump A fills at 500 L/min and Pump B at 300 L/min. How many minutes will it take to fill the pool using both pumps together?

    Answer: 100 minutes

    Combined rate = 500 + 300 = 800 L/min; time = 80 000 ÷ 800 = 100 minutes.