Unit 4 · Class 6 IB MYP · MCQ Test
Ratios MCQ Test — Class 6 IB MYP
Practice 10 multiple-choice questions with instant answer reveal and explanations.
Ratios — MCQ Questions
1Simplify the ratio 10 : 15.
Show Answer+
Answer: 2 : 3
Hint: Divide both numbers by their GCD (5).
Solution:
GCD of 10 and 15 is 5. — 10 : 15 = 2 : 3
2Write the ratio of 4 girls to 6 boys in simplest form.
Show Answer+
Answer: 2 : 3
Hint: Divide both numbers by 2.
Solution:
Simplify: — 4 : 6 = 2 : 3
3If the ratio of cats to dogs is 3 : 5, and there are 9 cats, how many dogs are there?
Show Answer+
Answer: 15
Hint: The multiplier is 9 ÷ 3 = 3. Apply it to the dogs.
Solution:
Scale factor: — 9 \div 3 = 3
Dogs: — 5 \times 3 = 15
4Express the ratio 8 : 12 : 20 in simplest form.
Show Answer+
Answer: 2 : 3 : 5
Hint: The GCD of 8, 12, and 20 is 4.
Solution:
Divide all by 4: — 8 : 12 : 20 = 2 : 3 : 5
5Which ratio is equivalent to 5 : 8?
Show Answer+
Answer: 15 : 24
Hint: Multiply both parts of 5 : 8 by the same number.
Solution:
Multiply by 3: — 5 \times 3 : 8 \times 3 = 15 : 24
6A recipe uses flour and sugar in the ratio 3 : 1. If you use 12 cups of flour, how many cups of sugar do you need?
Show Answer+
Answer: 4
Hint: 12 ÷ 3 = 4. Multiply the sugar part by 4.
Solution:
Scale factor: — 12 \div 3 = 4
Sugar: — 1 \times 4 = 4 \text{ cups}
7Simplify 24 : 36.
Show Answer+
Answer: 2 : 3
Hint: GCD of 24 and 36 is 12.
Solution:
Divide by 12: — 24 : 36 = 2 : 3
8A bag has red and blue beads in the ratio 2 : 7. What fraction of the beads are red?
Show Answer+
Answer: $\frac{2}{9}$
Hint: Total parts = 2 + 7 = 9. Red fraction = red parts / total parts.
Solution:
Total parts: 2 + 7 = 9.
Fraction of red: — \frac{2}{9}
9Write the ratio 50 cm to 2 m in simplest form.
Show Answer+
Answer: 1 : 4
Hint: Convert to the same units first: 2 m = 200 cm.
Solution:
Convert: — 2 \text{ m} = 200 \text{ cm}
Ratio: — 50 : 200 = 1 : 4
10If 3 : 4 = 12 : $x$, find $x$.
Show Answer+
Answer: 16
Hint: The scale factor is 12 ÷ 3 = 4.
Solution:
Scale factor: — 12 \div 3 = 4
Find x: — x = 4 \times 4 = 16
Want more questions?
Practice 60+ questions with AI-powered doubt clearing and step-by-step solutions.
Tips for Ratios MCQs
- 1Read each question carefully and identify what is being asked before looking at the options.
- 2Try to solve the problem mentally or on paper first, then match your answer with the options.
- 3Use elimination — rule out clearly wrong options to improve your chances even when unsure.
- 4Check units, signs, and edge cases — these are common traps in Ratios MCQs.
- 5Review your mistakes after completing the test to build lasting understanding.
Master Ratios on SparkEd
Go beyond MCQs. Practice at three difficulty levels with instant feedback, solutions, and an AI coach to clear every doubt.
Start PractisingSparkEd Maths offers free MCQ tests for Class 1-10 across 7 education boards. All questions are aligned to the 2025-26 syllabus with step-by-step solutions and AI-powered doubt clearing.