Lesson R7
R7 Proportion as equality of ratios Quiz: AQA Maths, Unit 3
20 questions
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Lesson R7, Proportion as equality of ratios: 20 multiple choice questions for the AQA GCSE Maths (8300), Unit 3: Ratio, proportion and rates of change, written with Revision Ninja.
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The 20 questions
-
Is 2:3 equal to 6:9?
- Yes, both simplify to 2:3
- No, because 6 is not double 3
- No, because 6 + 9 is not 2 + 3 plus 5
- Yes, both simplify to 2:5
-
Find x if 3:4 = x:20.
- 12
- 5
- 16
- 15
-
Find y if 5:y = 15:27.
- 3
- 18
- 9
- 27
-
Find x if 4:6 = 10:x.
- 25
- 10
- 12
- 15
-
If 5 pens cost 8 pounds, how much do 15 pens cost at the same rate?
- 30 pounds
- 20 pounds
- 24 pounds
- 40 pounds
-
Which pair of quantities is in direct proportion?
- Number of workers and time to finish a job
- Brightness of a bulb and distance from it
- Speed and time for a fixed distance
- Number of pens and total cost at a fixed price
-
Are the pairs 3 : 12 and 5 : 20 in the same ratio?
- Yes, both simplify to 1:3
- Yes, both simplify to 1:4
- No, because 3 + 12 is not 5 + 20
- No, because 12 is not a multiple of 5
-
Find x if 2:5 = x:35.
- 10
- 7
- 12
- 14
-
Find x if 4:7 = 12:x.
- 21
- 84
- 19
- 28
-
Two kilograms of cheese costs 3 pounds. What does 5 kg cost at the same rate?
- 15 pounds
- 6 pounds
- 10 pounds
- 7.50 pounds
-
A bag of 4 apples costs 1.20 pounds. What do 10 apples cost at the same rate?
- 2.40 pounds
- 12 pounds
- 4 pounds
- 3 pounds
-
In y = 3x, what is the constant of proportionality?
- 4
- 12
- 3
- 7
-
Ratio 3 : 5 — if 12 corresponds to 3, what corresponds to 5?
- 15
- 20
- 12
- 25
-
A recipe uses 100 g butter for 150 g flour. How much butter is needed for 240 g flour?
- 160 g
- 120 g
- 240 g
- 180 g
-
Find x if 7 : 3 = 21 : x.
- 63
- 18
- 9
- 7
-
Are the points (2, 5), (4, 10) and (6, 15) in direct proportion?
- Yes, since each y is 2.5 times x
- Yes, since each y is 3 times x
- No, since 5 + 2 is not 10
- No, since 15 is not double 10
-
If a : b = 5 : 2 and b = 6, what is a?
- 30
- 2.4
- 12
- 15
-
Find x if 9 : 12 = 3 : x.
- 9
- 4
- 3
- 36
-
(H) If a/b = 2/3 and a + b = 35, what is a?
- 14
- 35
- 10
- 21
-
(H) If speed doubles, what happens to the time taken for a fixed distance?
- Quadruples
- Stays the same
- Halves
- Doubles
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