1. Which ratio is equivalent to 1:2?
- A2:4
- B2:3
- C3:2
- D1:3
Show answer
Answer: A) 2:4
Multiply both terms of 1:2 by 2 to get 2:4. So 1:2 = 2:4.
Class 6 Equivalent Ratios — practice questions with answers
Ratio and Proportion · 5 sample questions from the school syllabus. Try each one, then open the answer and the worked solution.
2. Find the missing number: 4:5 = 16:?
- A40
- B18
- C22
- D20
Show answer
Answer: D) 20
4 is multiplied by 4 to get 16, so multiply 5 by 4: 5 × 4 = 20.
3. Which of these ratios is in its simplest (lowest) form?
- A7:9
- B6:8
- C10:15
- D4:6
Show answer
Answer: A) 7:9
7 and 9 have no common factor other than 1, so 7:9 is already simplest. The others can be reduced.
4. A paint mixture in a Delhi shop uses red and yellow in the ratio 3:5.
To make a bigger batch with 35 litres of yellow paint in the same ratio,
how many litres of red paint are needed?
To make a bigger batch with 35 litres of yellow paint in the same ratio,
how many litres of red paint are needed?
- A23
- B42
- C19
- D21
Show answer
Answer: D) 21
Yellow 5 is multiplied by 7 to get 35 litres, so red = 3 × 7 = 21 litres.
5. A ratio 9:12 is to be written as an equivalent ratio of the form ?:20.
A student notices that 9:12 must first be simplified before scaling so the second term can become 20.
What is the correct first term?
A student notices that 9:12 must first be simplified before scaling so the second term can become 20.
What is the correct first term?
- A15
- B16
- C12
- D18
Show answer
Answer: A) 15
9:12 simplifies to 3:4. To make the second term 20, multiply by 5: 4 × 5 = 20 and 3 × 5 = 15. So the first term is 15.
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