Quantitative Aptitude: Number Series Set 11

Directions: What will come in place of (?) in following series following a certain pattern?

  1. 6, 7, 16, 51, 208, ?
    A) 1081
    B) 1159
    C) 1066
    D) 1045
    E) 1160
    View Answer
    Option D
    Pattern:
    *1 + 1, *2 + 2, *3 + 3, *4 + 4, *5 + 5.
  2. 102, 79, 66, 47, 38, ?
    A) 41
    B) 39
    C) 23
    D) 12
    E) 40
    View Answer
    Option C
    Pattern:  
    10^2 + 2, 9^2 – 2, 8^2 + 2, 7^2 – 2, 6^2 + 2, 5^2 – 2
     
  3. 3, 5, 21, 115, 819,
    A) 7481
    B) 7389
    C) 7166
    D) 7245
    E) 7160
    View Answer
    Option B
    Pattern:
    *1 + 2, *3 + 6, *5 + 10, *7 + 14, *9 + 18
  4. 26, 13, 20, 51, 180,   
    A) 812
    B) 659
    C) 866
    D) 745
    E) 760
    View Answer
    Option A
    Pattern:
    *0.5 + 0, *1.5 + 0.5, *2.5 + 1, *3.5 + 1.5, *4.5 + 2
  5. 223, 167, 119, 79, 47, ?
    A) 31
    B) 29
    C) 26
    D) 35
    E) 23
    View Answer
    Option E
    Pattern:
    15^2 – 2 = 223, 13^2 – 2 = 167, 11^2 – 2 = 119, 9^2 – 2 = 79, 7^2 – 2 = 47, 5^2 – 2 = 23
  6. 2, 15, 42, 97, 208, ?
    A) 381
    B) 459
    C) 431
    D) 445
    E) 360
    View Answer
    Option C
    Pattern:
    2*2 + 11, 15*2 + 12, 42*2 + 13, 97*2 + 14, 208*2 + 15
  7. 3, 4, 15, 56, 285, ?
    A) 1681
    B) 1759
    C) 1666
    D) 1704
    E) 1660
    View Answer
    Option D
    Pattern:
    *2 – 2, *3 + 3, *4 – 4, *5 + 5, *6 – 6
  8. 16, 8, 6, 7, 14.5,  
    A) 50.75
    B) 61.55
    C) 58.25
    D) 70.45
    E) 51.60
    View Answer
    Option C
    Pattern:
    *0.25  + 4, *0.5  + 2, *1  + 1, *2  + 0.5, *4 + 0.25
  9. 1, 3, 10, 38, 168, ?
    A) 881
    B) 872
    C) 866
    D) 845
    E) 860
    View Answer
    Option B
    Pattern:
    *1 + 2, *2 + 4, *3 + 8, *4 + 16, *5 + 32
  10. 2, 8, 15, 26, 46, ?
    A) 88
    B) 79
    C) 66
    D) 75
    E) 82
    View Answer
    Option E
    Pattern:

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