1. There are 30 students in a class, the ratio of boys to girls is 2:1. Assuming the same number of boys, how many more girls are needed in the class to invert this ratio (i.e so that it is 1:2)?

10

40

30

20

1 of 7

Other questions in this quiz

2. Out of 100 pens, 30 are red, 45 are blue and the rest are green. Which of the following expresses the ratio of red pens to green pens to blue pens?

6:5:9

6:9:5

9:6:5

5:9:6

3. The ratio of apples to oranges in a fruit basket is 7:3. If there are 21 oranges, how many apples are there?

63

49

9

27

4. If x is 4 times bigger than y, and the difference between x and y is 9, what is x equal to?

12

24

9

10

5. The total number of ducks and geese in a pond is 40. If there are 12 ducks, what is the ratio of ducks to geese?

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