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Series Completion Questions Answers

  • 1. Complete the series 2,2,5, 13,28,....

    1. 50
    2. 51
    3. 52
    4. 53
    Answer And Explanation

    Answer: Option C

    Explanation:

    \begin{aligned}
    \text{Pattern is }\\
    +1^2-1, +2^2-1, +3^2-1,+4^2-1 \\
    5^2-1 = 28 + 24 \\
    = 52
    \end{aligned}

  • 2. Which number would replace the question mark in series
    7,12,19,?,39

    1. 24
    2. 28
    3. 31
    4. 33
    Answer And Explanation

    Answer: Option B

    Explanation:

    Pattern is , +5, +7, +9
    Missing Number = 19+9 = 28

  • 3. Complete the series, 1, 4, 9, 16, 25,....

    1. 36
    2. 38
    3. 49
    4. 52
    Answer And Explanation

    Answer: Option A

    Explanation:

    Series Pattern is +3, +5, +7, +9.

    So next number = 25+11 = 36

  • 4. Complete the series
    20, 19, 17, ...., 10, 5

    1. 15
    2. 16
    3. 13
    4. 14
    Answer And Explanation

    Answer: Option D

    Explanation:

    Pattern is, -1, -2, ..,.. , -5

    So -3 and -4 will fill the blanks to make it a pattern.

    Next number will be 17-3 = 14

  • 5. 6, 11, 21, 36, 56, ?
    what will replace the question mark in the series ?

    1. 75
    2. 81
    3. 85
    4. 89
    Answer And Explanation

    Answer: Option B

    Explanation:

    Pattern is +5, +10, + 15, +20

    Next number in the series will be 56 + 25 = 81

  • 6. Complete the series
    1,6,13,22,33,...

    1. 46
    2. 48
    3. 49
    4. 51
    Answer And Explanation

    Answer: Option A

    Explanation:

    Pattern is +5, +7, +9, +11
    So next number will be +13
    => 33+13 = 46

  • 7. Which fraction will come next, \begin{aligned} \frac{1}{2}, \frac{3}{4}, \frac{5}{8}, \frac{7}{16}, ? \end{aligned}

    1. \begin{aligned} \frac{11}{32} \end{aligned}
    2. \begin{aligned} \frac{9}{28} \end{aligned}
    3. \begin{aligned} \frac{9}{30} \end{aligned}
    4. \begin{aligned} \frac{9}{32} \end{aligned}
    Answer And Explanation

    Answer: Option D

    Explanation:

    Numerators of the fractions in the given sequence are getting increased by 2, i.e. 1+2,3+2,5+2, so next will be 7+2 = 9

    Denominators of the fractions in the series is getting doubled, 2*2 = 4, 4*2 = 8, 8*2 = 16, no next will be 16*2 = 32

    So resulting fraction will be
    \begin{aligned}
    \frac{9}{32}
    \end{aligned}