If a:b = 4:4 and b:c = 4:6, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 4:4 and b:c = 4:6, then a:b:c = ?

A. 4:5:6

B. 3:4:7

C. 8:8:12

D. 4:4:6

Answer: Option D

Combine ratios: a:b = 4:4, b:c = 4:6 ⇒ a:b:c = 4:4:6.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Ratio of present ages of A and B is 7:7. After 10 years, the ratio becomes 10:8. Present age of A is?

A. 308 years

B. 150 years

C. 154 years

D. 159 years

Correct Answer: Option C

Explanation:
Let ages 7k and 7k. Then (7k + 10)/(7k + 10) = 10/8. Solving gives k ≈ 22, age of A = 7*22 = 154.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

Two numbers are in ratio 11:4. Their difference is 116. What is their sum?

A. 621

B. 292

C. 695

D. 585

Correct Answer: Option D

Explanation:
Numbers 11k, 4k. Difference |11-4|k = 116 ⇒ k = 16. Sum = (11+4)k ≈ 585.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Ratio of present ages of A and B is 4:8. After 6 years, the ratio becomes 5:10. Present age of A is?

A. 52 years

B. 56 years

C. 112 years

D. 61 years

Correct Answer: Option B

Explanation:
Let ages 4k and 8k. Then (4k + 6)/(8k + 6) = 5/10. Solving gives k ≈ 14, age of A = 4*14 = 56.

This question belongs to: Maths Ratio and Proportion