NUST NET Quantitative Maths chapter 2: Quantitative · Percentages, ratio and commercial maths MCQs with answers

By Team Megalecture · Updated 13 Nov 2026

86 exam-style questions on Quantitative · Percentages, ratio and commercial maths, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.

86 questions · 4 topics · 10 per test

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What chapter 2 covers

Ten Quantitative · Percentages, ratio and commercial maths questions with answers

Try each one, then open the answer. These ten stay the same; the test draws new ones every time.

1. A table is sold at a loss of 8%. Had it been sold for Rs 300 more, there would have been a gain of 4%. What is the cost price?

  1. A
    Rs 2,400
  2. B
    Rs 2,500
  3. C
    Rs 3,750
  4. D
    Rs 7,500
Show answer

Answer: B. The extra Rs 300 moves the result from −8% to +4%, i.e. 12% of cost. So cost = 300 ÷ 0.12 = Rs 2,500. Rs 3,750 uses only 8%.

2. Two jugs of equal size are full of milk and water: in the first, milk : water = 3 : 1 and in the second, milk : water = 1 : 1. Both jugs are poured into one large container. What is the ratio of milk to water in the mixture?

  1. A
    5 : 3
  2. B
    2 : 1
  3. C
    3 : 1
  4. D
    7 : 5
Show answer

Answer: A. Take each jug as 1 unit: milk = 3/4 + 1/2 = 5/4 and water = 1/4 + 1/2 = 3/4, so the ratio is 5 : 3. 2 : 1 comes from adding the ratio terms (4 : 2), which is wrong because the jugs have different numbers of parts.

3. A price rose by 50%. After a cut, it is now only 20% above the original price. By what percentage was the raised price cut?

  1. A
    20%
  2. B
    25%
  3. C
    30%
  4. D
    50%
Show answer

Answer: A. Take the original as 100: raised to 150, now 120. The cut is 30 on 150, which is 20%. 30% is the drop in percentage points, and 25% divides 30 by 120.

4. An electricity bill has a fixed charge of Rs 300, plus Rs 25 per unit for the first 100 units and Rs 35 per unit for each unit after that. What is the bill for 160 units?

  1. A
    Rs 4,300
  2. B
    Rs 4,600
  3. C
    Rs 4,900
  4. D
    Rs 5,900
Show answer

Answer: C. 300 + 100 × 25 + 60 × 35 = 300 + 2,500 + 2,100 = Rs 4,900. Rs 4,600 forgets the fixed charge.

5. Two numbers are in the ratio 3 : 5. When 6 is added to each, the ratio becomes 2 : 3. What is the smaller number?

  1. A
    12
  2. B
    18
  3. C
    24
  4. D
    30
Show answer

Answer: B. Let the numbers be 3k and 5k: (3k + 6) : (5k + 6) = 2 : 3 gives 9k + 18 = 10k + 12, so k = 6 and the smaller number is 18.

6. A salesman earns a fixed Rs 25,000 a month plus 5% commission on sales above Rs 50,000. In one month his sales are Rs 130,000. What are his total earnings?

  1. A
    Rs 26,500
  2. B
    Rs 29,000
  3. C
    Rs 30,000
  4. D
    Rs 31,500
Show answer

Answer: B. Commission = 5% of (130,000 − 50,000) = 5% of 80,000 = Rs 4,000, so earnings = 25,000 + 4,000 = Rs 29,000. Rs 31,500 pays commission on all sales.

7. Find the simple interest on Rs 20,000 at 8% per annum for 3 years.

  1. A
    Rs 1,600
  2. B
    Rs 4,000
  3. C
    Rs 4,800
  4. D
    Rs 5,600
Show answer

Answer: C. SI = P × R × T/100 = 20,000 × 8 × 3/100 = Rs 4,800. Rs 1,600 is one year only.

8. If x% of 50 equals 20% of 75, then x is

  1. A
    15
  2. B
    20
  3. C
    30
  4. D
    37.5
Show answer

Answer: C. 20% of 75 = 15, so x/100 × 50 = 15 and x = 30. 15 is the value of 20% of 75, not x.

9. Two successive increases of 10% and 20% are equivalent to a single increase of

  1. A
    15%
  2. B
    30%
  3. C
    32%
  4. D
    132%
Show answer

Answer: C. 1.10 × 1.20 = 1.32, which is a 32% increase. Adding the percentages (30%) ignores the second increase acting on the larger amount; 132% is the multiplier, not the increase.

10. What is 15% of Rs 2,400?

  1. A
    Rs 160
  2. B
    Rs 240
  3. C
    Rs 360
  4. D
    Rs 384
Show answer

Answer: C. 10% of 2,400 is 240 and 5% is 120, so 15% is Rs 360. Rs 160 is 2,400 ÷ 15, a wrong method.

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Ways to practise this chapter

Quantitative · Percentages, ratio and commercial maths: questions students ask

How many Quantitative · Percentages, ratio and commercial maths MCQs are there?

86, each with the answer and a short explanation, across 4 topics: Percentages and percentage change, Ratio, proportion and variation, Profit, loss, discount and tax, Interest, depreciation and instalments. Every chapter test draws ten of them, so you can take it many times.

Is the NUST NET Quantitative Maths chapter 2 test free?

Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.

How is the chapter test marked?

The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.

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