If a:b = 2:8 and b:c = 8:8, then a:b:c = ? MCQ with Answer and Explanation

If a:b = 2:8 and b:c = 8:8, then a:b:c = ?

A. 4:16:16

B. 2:8:8

C. 2:9:8

D. 1:8:9

Answer: Option B

Combine ratios: a:b = 2:8, b:c = 8:8 ⇒ a:b:c = 2:8:8.

This question belongs to: Maths Ratio and Proportion

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Question #1 Report Error

Two numbers are in the ratio 14:7 and their sum is 130. Find the numbers.

A. 110 and 31

B. 70 and 52

C. 84 and 42

D. 168 and 84

Correct Answer: Option C

Explanation:
Numbers = 14k and 7k. 14k + 7k = 130 ⇒ k = 6. Thus, numbers are 84 and 42.

This question belongs to: Maths Ratio and Proportion

Question #2 Report Error

If a:b = 7:7 and b:c = 7:6, then a:b:c = ?

A. 7:7:6

B. 6:7:7

C. 14:14:12

D. 7:8:6

Correct Answer: Option A

Explanation:
Combine ratios: a:b = 7:7, b:c = 7:6 ⇒ a:b:c = 7:7:6.

This question belongs to: Maths Ratio and Proportion

Question #3 Report Error

Find the mean proportional between 11 and 61.

A. 25

B. 50

C. 72

D. 28

Correct Answer: Option A

Explanation:
Mean proportional = √(11 × 61) = √(671) = 25.

This question belongs to: Maths Ratio and Proportion