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RRB OS - I Aptitude Test - 2
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RRB OS - I Aptitude Test - 2
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  • Question 1/10
    1 / -0

    What will come in place of the question mark (?) in the following number series?

    12, 36, 18, 54, 27, ?

    Solutions

    Numbers are alternatively multiplied by 3 and divided by 2.
    So, the next number is 27 x 3 = 81.

     

  • Question 2/10
    1 / -0

    What will come in place of the question mark (?) in the following number series?

    31, 15, 14, 18, 37,?

    Solutions

    31 × 0.5 – 0.5 = 15
    15 × 1 – 1 = 14
    14 × 1.5 – 1.5 = 19.5
    19.5 × 2 – 2 = 37
    37 × 2.5 – 2.5 = 90

     

  • Question 3/10
    1 / -0

    What will come in place of the question mark (?) in the following number series?

    6, 8, 14, 26, 46,?

    Solutions

     

  • Question 4/10
    1 / -0

    What will come in place of the question mark (?) in the following number series?

    111, 109, 103, 91, ?, 41

    Solutions

    111 – 1 × 2 = 109
    109 – 2 × 3 = 103
    103 – 3 × 4 = 91
    91 – 4 × 5 = 71
    71 – 5 × 6 = 41

     

  • Question 5/10
    1 / -0

    What will come in place of the question mark (?) in the following number series?

    8, 15, ?, 169, 841

    Solutions

    8 × 2 – 1 = 15
    15 × 3 – 2 = 43
    43 × 4 – 3 = 169
    169 × 5 – 4 = 841

     

  • Question 6/10
    1 / -0

    In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer.

    I.  X2 − 33X + 272 = 0

    II.  Y2 − 29Y + 204 = 0

    Solutions

     

  • Question 7/10
    1 / -0

    In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer.

    I. X2 − 28X + 195 = 0

    II.Y2 − 34Y + 285 = 0

    Solutions

     

  • Question 8/10
    1 / -0

    Directions For Questions

    In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer.

    (A) if x > y

    (B) if x < y

    (C) if x ≥ y

    (D) if x ≤ y

    (E) x = y or relation cannot be established between x and y

    ...view full instructions

    I. 12x2 + 17x + 6 = 0

    II. 4y2 + 25y + 21 = 0

    Solutions

     

  • Question 9/10
    1 / -0

    Directions For Questions

    In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer.

    (A) if x > y

    (B) if x < y

    (C) if x ≥ y

    (D) if x ≤ y

    (E) x = y or relation cannot be established between x and y

    ...view full instructions

    I. 4x2 = 64

    II. y2 + 7y + 12 = 0

    Solutions

    So, x = y or relation cannot be established between x and y.

     

  • Question 10/10
    1 / -0

    Directions For Questions

    In each of these questions, two equations (I) and (II) are given. You have to solve both the equations and give answer.

    (A) x > y

    (B) x ≥ y

    (C) x < y

    (D) x ≤ y

    (E) x = y or no relation can be established between x and y.

    ...view full instructions

    I. 15x2 − 41x + 14 = 0

    II. 2y2 − 13y + 20 = 0

    Solutions

     

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