Introduction to Ratios

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The ratio of a and b should be written as

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a : b

a + b

b + a

b : a

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A relation between 2 quantities of the same kind (measured in same unit) is called

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proportion

variation

ratio

probability

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Which ratio is different from the others?

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8 to 15

15 : 8

8 : 15

8/15

probability

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What is the ratio of green to yellow counters

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2:3

6:9

6:3

3:6

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What is the ratio of squares : circles : triangles?

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8 : 7 : 5

7 : 8 : 5

5 : 7 : 8

7 : 5 : 8

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There are 14 girls and 9 boys in a Year 8 maths class. The ratio of boys to girls is:

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14 : 9

9 : 14

14 : 23

9 : 23

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In a class there are 20 boys and 15 girls. The ratio of boys to girls is:

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4 : 3

3 : 4

4 : 5

None of the above.

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Express Jack’s money to Jill’s money as a ratio, given that Jack has $16 and Jill has $25.

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16 : 25

25 : 16

$16 : $25

$25 : $16

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A ratio equivalent to 3 : 7 is:

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3 : 9

6 : 10

9 : 21

18 : 49

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5 : 2

3 : 2

5 : 3

2 : 3

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