Preference

Question: The reciprocal of p/n is n/p and vice versa. Which of the following is the reciprocal of 3/√12?

  1. a.
    √2/3
  2. b.
    2/√3
  3. c.
    4√3/3
  4. d.
    12/9
  5. e.
    12/√3
Answer: b

Question:

If 2n = 128 and y = 5, then 2n - 1 × 5n - 2y - 1 =?

  1. a.

    100000

  2. b.

    1000000

  3. c.

    10000000

  4. d.

    None of these

Answer: a

Question: If x/bc = y/ca = z/ab, then x + y + z =?

  1. a.
    (a + b + c)/abc
  2. b.
    1
  3. c.
    0
  4. d.
    a + b + c
  5. e.
    None of them
Answer: c

Question: If (X + Y) = 9 and X/Y = 2, then X is equal to:

  1. a.
    3
  2. b.
    4
  3. c.
    5
  4. d.
    6
Answer: d

Question: What will be the result if (4x + 20)/4 is subtracted from (x + 10)?

  1. a.
    5
  2. b.
    x
  3. c.
    x/2
  4. d.
    2 - x
  5. e.
    None of these
Answer: a

Question:

Which of the following equations is not equivalent to 25x2 = y2 - 4?

  1. a.

    25x2 + 4 = y2

  2. b.

    7x2 = 3y2 - 12

  3. c.

    25x2 = (y + 2)(y - 2)

  4. d.

    5x = y - 2

Answer: b, d

Question: If Tk./$ = 68 and Tk./£ = 102, then cross rate of £/$ is equal to:

  1. a.
    3/2
  2. b.
    2/3
  3. c.
    5/2
  4. d.
    5/3
  5. e.
    5/4
Answer: b

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