Ratio & Proportion: Hard Test 5
15 questions · 15 minutes
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Example questions from this paper
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- A : B = 3 : 5 and B : C = 2 : 7. What is A : B : C in its simplest form?
- Two numbers are in the ratio 4 : 7. When 6 is added to each number, the ratio becomes 5 : 8. What is the smaller of the original numbers?
- £480 is shared between three people in the ratio 5 : 6 : 9. How much is the smallest share?
- Nine builders take 20 days to build a wall. How many builders would be needed to build the same wall in 12 days?
- The sides of a rectangle are in the ratio 5 : 3 and its area is 240 cm². What is its perimeter?
Before you begin, remember
- Add the parts first. For a ratio of 3:5 there are 8 parts in total, so divide the amount by 8 to find the value of one part.
- Simplify ratios exactly as you would fractions, by dividing both sides by the highest common factor.