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Quiz Chapter 4: Ratios, Rates and Proportions

10 questions ยท Form 1 Mathematics Bab 4: Ratios, Rates and Proportions

Question 1 of 10Score: 0

If x : 12 = 5 : 4, find the value of x.

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. If x : 12 = 5 : 4, find the value of x.

  1. 15
  2. 10
  3. 20
  4. 16
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Answer: A

x12 = 54 -> 4x = 60 -> x = 15.

2. A recipe uses flour and sugar in the ratio 5 : 2. If 250 g of flour is used, how much sugar is needed?

  1. 100 g
  2. 125 g
  3. 150 g
  4. 50 g
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Answer: A

5 parts = 250 g -> 1 part = 50 g. Sugar = 2 parts = 2 x 50 g = 100 g.

3. Express 45% as a ratio in its simplest form.

  1. 9 : 20
  2. 9 : 10
  3. 45 : 100
  4. 9 : 25
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Answer: A

45% = 45100 = 920 -> 9 : 20.

4. If a : b = 3 : 4 and the sum of a and b is 35, find the value of b.

  1. 20
  2. 15
  3. 25
  4. 10
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Answer: A

Total parts = 3 + 4 = 7 parts = 35 -> 1 part = 5. Value of b = 4 x 5 = 20.

5. Which of the following is a rate?

  1. RM5 per kilogram
  2. 3 : 7
  3. 25%
  4. 4 metres out of 10 metres
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Answer: A

RM5 per kilogram compares two different quantities (money and mass) with different units, which defines a rate.

6. Simplify the fraction ratio 12 : 34.

  1. 2 : 3
  2. 3 : 4
  3. 1 : 3
  4. 4 : 3
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Answer: A

Multiply both sides by 4 (LCM of denominators): (12 x 4) : (34 x 4) = 2 : 3.

7. In a town, 65% of the population are adults. What is the ratio of adults to non-adults in simplest form?

  1. 13 : 7
  2. 13 : 20
  3. 7 : 13
  4. 65 : 35
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Answer: A

Adults = 65%, Non-adults = 35%. Ratio = 65 : 35 = 13 : 7.

8. Which of the following ratios is equivalent to 3 : 5?

  1. 12 : 20
  2. 9 : 20
  3. 6 : 15
  4. 15 : 20
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Answer: A

Multiply both terms by 4: 3 x 4 = 12 and 5 x 4 = 20. Thus, 3 : 5 = 12 : 20.

9. Convert 90 km/h into m/s.

  1. 25 m/s
  2. 15 m/s
  3. 30 m/s
  4. 20 m/s
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Answer: A

90 x 1000 m3600 s = 900003600 = 25 m/s.

10. Simplify the ratio 0.6 : 1.5.

  1. 2 : 5
  2. 3 : 5
  3. 1 : 3
  4. 2 : 3
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Answer: A

Multiply by 10 -> 6 : 15. Divide by 3 -> 2 : 5.

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