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Ratio and Proportion — Practice Quiz

ICSE · Class 7 · Mathematics

Try a 4-question quiz on Ratio and Proportion for ICSE Class 7 Mathematics: tap an answer to check it and see why. 52 questions in the full chapter test.

52 questions24 flashcards14 formulas & key relations5 concepts

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Quick Quiz: Ratio and Proportion

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1

Two numbers are in the ratio 10:13. Their difference is 48. What are the numbers?

2

₹260 is divided among A, B and C in the ratio 1/2 : 1/3 : 1/4. What is B's share?

3

Two numbers are in the ratio 4:5 and their L.C.M. is 180. What are the numbers?

4

Two numbers are in the ratio 3:4 and their H.C.F. is 15. What are the numbers?

52 Questions·
multiple choicetrue falsemultiple correct

Sample Questions

1multiple choice
3 marks

A certain quantity of wheat is divided into two parts in the ratio 5:8. If the second part is 112 kg, what is the total quantity of wheat?

Show answer

182 kg

If 8 parts = 112 kg, then 1 part = 112 ÷ 8 = 14 kg. The first part is 5 × 14 = 70 kg. Total quantity = 70 + 112 = 182 kg.

2multiple choice
3 marks

If A:B = 3:5 and B:C = 4:7, what is A:B:C?

Show answer

12:20:35

Make B the same in both ratios. Multiply 3:5 by 4 to get 12:20. Multiply 4:7 by 5 to get 20:35. So A:B:C = 12:20:35.

3multiple choice
3 marks

Find the mean proportional between 16 and 4.

Show answer

8

If b is the mean proportional between a and c, then b^2 = ac. Here a = 16 and c = 4. So b^2 = 16 × 4 = 64, hence b = 8.

4multiple choice
3 marks

Find the third proportional to 12 and 30.

Show answer

75

For third proportional, 12:30 = 30:x. Using cross multiplication, 12x = 30 × 30 = 900. So x = 900 ÷ 12 = 75.

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Frequently Asked Questions

What are the important topics in Ratio and Proportion for ICSE Class 7 Mathematics?
Key topics in Ratio and Proportion include Ratio: Meaning, Terms, and Simplest Form, Converting Fractional Ratios and Sharing in a Ratio, Ratio Problems Using L.C.M., H.C.F., and Unitary Method, Proportion, Extremes, Means, and Fourth Proportional. Study these first, then practise questions on each for Class 7 exams.
How many practice questions are there for Ratio and Proportion?
There are 52 questions on Ratio and Proportion. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

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