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Answer the following questions based on ratio and proportion

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Multiple choice

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1.

If 4 : 9 = 63 : x, then x =

  141.75

  28.75

  144

  141

  28

  Half-n-half Clue
 

2.

24-carat gold is pure gold. 18-carat gold is 3/4 gold and 20-carat gold is 5/6 gold. The ratio of pure gold in 20-carat gold to pure gold in 18-carat gold is

  5 : 4

  9 : 10

  5 : 8

  10 : 9

  8 : 5

  Half-n-half Clue
 

3.

The ratio of 8 inches to 4 feet is

  1 : 6

  1 : 4

  2 : 1

  1 : 2

  6 : 1

  Half-n-half Clue
 

4.

A fertilizer contains 3 parts nitrogen, 2 parts phosphate and 2 parts potash by weight. The weight of fertilizer that will contain 36 pounds of nitrogen is

  90 pounds

  63 pounds

  126 pounds

  60 pounds

  84 pounds

  Half-n-half Clue
 

5.

x is proportional to y. If x = 7 when y = 8, what is x when y = 42?

  48.25

  48

  48.75

  36.75

  36

  Half-n-half Clue
 

6.

If there are 16 ounces in 1 pound, the ratio of 6 ounces to 3¾ pounds is

  5 : 8

  2 : 1

  1 : 10

  8 : 5

  10 : 1

  Half-n-half Clue
 

7.

A class of 42 students has 14 girls. The ratio of boys to girls is

  3 : 2

  3 : 1

  1 : 3

  1 : 2

  2 : 1

  Half-n-half Clue
 


 
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