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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)

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

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

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

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

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

150
20
30
120
90 