Quantitative Aptitude: Number Series Set 57 (for Clerk Prelims)

Shubhra

Directions: The following series are based on a certain pattern. Find the number represented by question mark (?) in the following series:

  1. 267, 244, 219, 190, ?, 100
    A) 135
    B) 127
    C) 157
    D) 162
    E) 153
    View Answer
      Option E
    Pattern    :
    …..-23 …..-25……-29…..-37………-53
    ………….2………..4……..8………16
  2. 265, 264, 272, 245, 309, ?
    A) 149
    B) 157
    C) 165
    D) 184
    E) 122
    View Answer
      Option D
    Pattern    :
    -13, +23, -33, +43, -53
  3. 0.5, 2, 7, 29, 146, ?
    A) 877
    B) 665
    C) 787
    D) 611
    E) 786
    View Answer
      Option A
    Pattern    :
    *2 + 1, *3 + 1, *4 + 1, *5 + 1
  4. 0.5, 2, 5, 12.5, 34.25, ?
    A) 113.25
    B) 124.25
    C) 106.25
    D) 122.25
    E) 102.25
    View Answer
      Option C
    Pattern    :
    *1 + 1.5, *1.5 + 2, *2 + 2.5, *2.5 + 3, *3 + 3.5
  5. 512, ?, 256, 64, 8, 0.5
    A) 348
    B) 512
    C) 420
    D) 558
    E) 396
    View Answer
      Option B
    Pattern    :
    *1, *2, *4, *8, *16
  6. 57, 82, 62, 77, 67, ?
    A) 79
    B) 84
    C) 62
    D) 72
    E) 69
    View Answer
      Option D
    Pattern    :
    ….+25…….-20…….+15……..-10………+5
  7. 3.5, 5, 12, 44, ?, 1284
    A) 215
    B) 127
    C) 263
    D) 338
    E) 325
    View Answer
      Option A
    Pattern    :
    *2 – 2, *3 – 3, *4 – 4, *5 – 5, *6 – 6
  8. 11, 4.5, 3, 2.5, 2.5, ?
    A) 1.25
    B) 3.25
    C) 2.75
    D) 3.5
    E) 1.75
    View Answer
      Option B
    Pattern    :
    *0.5 – 1, *1 – 1.5, *1.5 -2, *2 – 2.5, *2.5 – 3
  9. 13, 18, 25, 36, ?, 78
    A) 61
    B) 78
    C) 64
    D) 49
    E) 53
    View Answer
      Option E
    Pattern    :
    …..+5……….+7…………+11……….+17………….+25
    ………….+2………..+4…………+6………….+8
  10. 486, 384, 299, 231, 180, ?
    A) 146
    B) 122
    C) 132
    D) 157
    E) 139
    View Answer
      Option A
    Pattern    :
    -102……-85……..-68……….-51……….-34

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