Number Series


Direction: In each of the following questions a number series is given. A number is given after the series and then (a), (b), (c), (d) and (e) are given. According to the given series, you have to form a new series which begins with the given number, and then answer the question asked.

  1. 63.04.52.254.012
    40(a)(b)(c)(d)(e)
    Which of the following numbers will come in place of (c) ?
    1. 20.5
    2. 21.5
    3. 33.75
    4. 69.5
    5. 15

  1. View Hint View Answer Discuss in Forum

    The given series is in the below pattern ,
    First series :-
    First term = 6
    Second term = First term ÷ 2 = 3
    Third term = Second term × 1.5 = 4.5
    similarly , we can calculate the all next terms .
    ........... and so on.
    Second series :-
    First term = 40
    Second term = First term ÷ 2 = 20
    Third term = Second term × 1.5 = 30

    Correct Option: E

    The given series is in the below pattern ,
    First series :-
    First term = 6
    Second term = First term ÷ 2
    Second term = 6 ÷ 2 = 3
    Third term = Second term × 1.5
    Third term = 3 × 1.5 = 4.5
    similarly , we can calculate the all next terms .
    ........... and so on.
    Second series :-
    First term = 40
    Second term = First term ÷ 2
    Second term = 40 ÷ 2 = 20
    Third term = Second term × 1.5
    Third term = 20 × 1.5 = 30
    Fourth term = Third term ÷ 2
    Fourth term = 30 ÷ 2 = 15
    Hence , the place value of (c) is 15 .


  1. 4925103
    3(a)(b) (c)(d)(e)
    Which of the following numbers will come in place of (c) ?
    1. 391
    2. 81
    3. 91
    4. 79
    5. None of these

  1. View Hint View Answer Discuss in Forum

    The given series is in the below pattern ,
    First series :-
    First term = 4
    Second term = First term × 2 + 1 = 9
    Third term = Second term × 3 - 2 = 25
    similarly , we can calculate the all next terms .
    Second series :-
    First term = 3
    Second term = First term × 2 + 1 = 7
    Third term = Second term × 3 - 2 = 19

    Correct Option: D

    The given series is in the below pattern ,
    First series :-
    First term = 4
    Second term = First term × 2 + 1
    Second term = 4 × 2 + 1 = 9
    Third term = Second term × 3 - 2
    Third term = 9 × 3 - 2 = 25
    similarly , we can find the all others terms .
    ......... and so on .
    Second series :-
    First term = 3
    Second term = First term × 2 + 1
    Second term = 3 × 2 + 1 = 7
    Third term = Second term × 3 - 2
    Third term = 7 × 3 - 2 = 19
    Fourth term = Third term × 4 + 3
    Fourth term = 19 × 4 + 3 = 79
    Hence , the place value of ( c ) is 79 .



  1. 61032126
    2(a)(b)(c)(d)(e)
    Which of the following numbers will come in place of (a) ?
    1. 4
    2. 6
    3. 2
    4. 3
    5. None of these

  1. View Hint View Answer Discuss in Forum

    The series is × 2 – 2, × 3 + 2, × 4 – 2,...
    The given series is in the below pattern ,
    First series :-
    First term = 6
    Second term = First term × 2 - 2 = 10
    Third term = Second term × 3 + 2 = 32
    similarly , we can calculate the all next terms .
    Second series :-
    First term = 2
    Second term = First term × 2 - 2
    Third term = Second term × 3 + 2

    Correct Option: C

    The given series is in the below pattern ,
    First series :-
    First term = 6
    Second term = First term × 2 - 2
    Second term = 6 × 2 - 2 = 10
    Third term = Second term × 3 + 2
    Third term = 10 × 3 + 2 = 32
    similarly , we can find the all others terms .
    ......... and so on .
    Second series :-
    First term = 2
    Second term = First term × 2 - 2
    Second term = 2 × 2 - 2 = 2
    Hence , the place value of ( a ) is 2 .


  1. 74592052.5
    3(a)(b)(c)(d)(e)
    Which of the following numbers will come in place of (c) ?
    1. 4.5
    2. 2
    3. 6
    4. 7
    5. None of these

  1. View Hint View Answer Discuss in Forum

    As per the details in the question the series is in the form of
    First series :-
    First term = 7
    Second term = First term × 0.5 + 0.5 = 4
    Third term = Second term × 1 + 1 = 5
    similarly , we can calculate the all next terms .
    Second series :-
    First term = 3
    Second term = First term × 0.5 + 0.5 = 2
    Third term = Second term × 1 + 1 = 3

    Correct Option: C

    As per the details in the question the series is in the form of
    First series :-
    First term = 7
    Second term = First term × 0.5 + 0.5
    Second term = 7 × 0.5 + 0.5 = 4
    Third term = Second term × 1 + 1
    Third term = 4 × 1 + 1 = 5
    similarly , we can find the all others terms .
    Second series :-
    First term = 3
    Second term = First term × 0.5 + 0.5
    Second term = 3 × 0.5 + 0.5 = 2
    Third term = Second term × 1 + 1
    Third term = 2 × 1 + 1 = 3
    Fourth term = Third term × 1.5 + 1.5
    Fourth term = 3 × 1.5 + 1.5 = 6
    Hence , the place value of ( c ) is 6 .



  1. 3123066138282
    7(a)(b)(c)(d)(e)
    Which of the following numbers will come in place of (b) ?
    1. 34
    2. 70
    3. 46
    4. 62
    5. None of these

  1. View Hint View Answer Discuss in Forum

    As per the details in the question the series is in the form of
    First series :-
    First term = 3
    Second term = First term × 2 + 6 = 12
    Third term = Second term × 2 + 6 = 30
    similarly , we can calculate the all next terms .
    Second series :-
    First term = 7
    Second term = First term × 2 + 6 = 20
    Third term = Second term × 2 + 6 = 46

    Correct Option: C

    As per the details in the question the series is in the form of
    First series :-
    First term = 3
    Second term = First term × 2 + 6
    Second term = 3 × 2 + 6 = 12
    Third term = Second term × 2 + 6
    Third term = 12 × 2 + 6 = 30
    similarly , we can find the all others terms .
    Second series :-
    First term = 7
    Second term = First term × 2 + 6
    Second term = 7 × 2 + 6 = 20
    Third term = Second term × 2 + 6
    Third term = 20 × 2 + 6 = 46
    Hence , the place value of ( b ) is 46 .