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Oak MathsTest · Maths

Changing ratios

The starter and exit quiz of the lesson “Changing ratios”, from the unit “Ratio” (Year 10 Maths) by Oak National Academy.

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Oak National Academy

12 questions

  1. To combine ratios they must have a ___ component.
  2. Given these bar models. What is the ratio of hearts to suns?
  3. Given that squares : circles = 6 : 5 and circles : triangles = 1 : 3. Find the ratio of squares : triangles.
  4. a : b = 3 : 4, b : c = 5 : 9. Find the ratio a : b : c
  5. A box contains 185 sweets which are either hearts (h), stars (s) or bottles (b). The ratio of hearts to stars is 2 : 3. The ratio of stars to bottles is 5 : 4. How many bottles are in the box?
  6. b = 2a, c = 7b, find the ratio of a : c
  7. Which of the following is used as a separator in a ratio?
  8. There are 30 cans of drink and bags of sweets in a vending machine. The ratio of cans : bags is 2 : 1. 5 cans and 1 packet is sold. What is the ratio of cans : bags now? (In its simplest form)
  9. There are 24 vehicles in a car park. The ratio of cars : vans is 5 : 1. 4 more cars enter the car park. What is the ratio of cars : vans now? (Give your answer in its simplest form)
  10. The ratio of adults to children at an athletics club is 7 : 5. 2 more children join, the ratio is now 4 : 3. How many adults are members of the club?
  11. 3 bags contain counters in the ratio 3 : 2 : 4. Some counters are taken out of 1 bag and put into the other 2. The ratio of counters is now 1 : 1 : 2. What is the minimum number of counters removed?
  12. The ratio of the number of £1 coins to £2 in Sam’s money box is 2 : 3. Their gran gives them 4 more £1 coins, the ratio is now 5 : 6. How much money was in Sam’s money box originally?

License: OGL

Changing ratios · Examplary