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1. The expression (x-1 + y-1)/ y-1 is equivalent to:

     x/ (x – y)
     x/ (x - y)
     (x - y)/ x
     (x - y)/ y
     xy/ (x – y)

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2. If G = (x + y)/ 2 and H = 2xy/ (x + y) and G = H, then which of the following expressions is true?

     x = 1, y = 1
     x = 1, y = 1 b) xy = 0
     x = y = 0
     x + y = 0
     x = y

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3. If ‘x’ is one-fifth of ‘y’ and ‘y’ is one-third of ‘z’, then what is ‘z’ in terms of ‘x’?

     x/5
     x/3
     x/15
     15x
     20x

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4. If the average of ‘r’ and ‘s’ is equal to 80% of 3 times ‘r’, then what is the value of r/s?

     8/13
     1/12
     5/19
     4/9
     13/5

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5. The lines ‘m’ and ‘n’ are perpendicular to each other. If the equation of the line ‘m’ is x – 2y + 9 = 0, then the equation of the line ‘n’ passing through (2, 3) is?

     2x + y – 7 = 0
     2x + y – 5 = 0
     x – 2y + 10 = 0
     2x – y - 10 = 0
     x + 2y + 5 = 0

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6. The sum of 3 consecutive integers is 15. What is the product of these integers?

     150
     20
     30
     120
     90

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7. In triangle ABC, the angle ABC is 60° and side AD is perpendicular to side BCas shown in the figure below. If the length of the sideAB is12m andside BC is 20m, then what is the length of CD?

     6m
     12m
     8m
     18m
     14m

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