Quantitative Aptitude: Number Series Set 149

Mani
  1. 4 2 3 7.5 ? 118.125
    26.25
    38.75
    42.25
    28.75
    none of these
    Option A
    Series Pattern Given Series
    4 4
    4 × 0.5 = 2 2
    2 × 1.5 = 3 3
    3 × 2.5 = 7.5 7.5
    7.5 × 3.5 = 26.25 26.25 ✓
    26.25 × 4.5 = 118.125 118.125

    Hence, option (A) is correct.

     

  2. 256 252 279 263 388 ?
    341
    352
    323
    336
    none of these
    Option B

    Series Pattern Given Series
    256 256
    256 – 22 = 252 252
    252 + 33 = 279 279
    279 – 42 = 263 263
    263 + 53 = 388 388
    388 – 62 = 352 352 ✓

    Hence, option (B) is correct.

     


  3. 188 269 333 382 418 ?
    181
    126
    443
    315
    none of these
    Option C
    Series Pattern Given Series
    188 188
    188 + (9)2 = 269 269
    269 + (8)2 = 333 333
    333 + (7)2 = 382 382
    382 + (6)2 = 418 418
    418 + (5)2 = 443 443 ✓

    Hence, option (C) is correct.

     

  4. 420, 462, 506, 552, 600, ?
    725
    800
    350
    650
    675
    Option D
    20*21=420
    21*22=462
    22*23=506
    23*24=552
    24*25=600
    25*26=650
    Hence, option (D) is correct.

     

  5. 40 44 97 307 1253 ?
    6301
    6201
    6401
    6403
    6501
    Option A
    Correct Option: A
    The series is × 1 + 2*2, × 2 + 3*3, × 3 + 4*4, × 4 + 5*5, × 5 + 6*6, × 6 + 7*7

     

  6. 129 163 202 246 ? 349
    265
    285
    295
    275
    None of these
    Option C
    Correct Option: C
    The series is + (5 × 7) – 1, + (5 × 8) – 1, + (5 × 9) – 1, + (5 × 10) – 1, + (5 × 11) – 1, ….

     

  7. 3 13 39 89 ? 293
    172
    171
    174
    181
    183
    Option B
    Series Pattern Given Series
    3 3
    3 + (32 + 1) = 13 13
    13 + (52 + 1) = 39 39
    39 + (72 + 1) = 89 89
    89 + (92 + 1) = 171 171 ✓
    171 + (112 + 1) = 293 293
    Hence, option B is correct.

     

  8. 3, 2, 3, 6, ?, 37.5, 115.5
    11
    14
    16
    18
    none of these
    Option B
    Correct Option: B
    The series is ×0.5+0.5, ×1+1, ×1.5+1.5, *2+2, *2.5+2.5….

     

  9. 567 126 36 14.4 9.6 ?
    16.5
    17.9
    18.1
    12.6
    none of these
    Option E
    Correct Option: E
    Series Pattern Series
    567 567
    567 ÷ 4.5 126
    126 ÷ 3.5 36
    36 ÷ 2.5 14.4
    14.4 ÷ 1.5 9.6
    9.6 ÷ .5 19.2 ✓

     

  10. 441 428 407 370 ? 168
    288
    291
    301
    311
    245
    Option C
    Correct Option: C
    Series I : 441 428 407 370 ? 168
    Sereis II : –13 –21 –37 ? ?
    Series III : 8 16 32 ?
    Series IV ×2 ×2 ×2
    Clearly, the pattern in series IV is multiplication of 2.

    So, the missing term in series III = 32 × 2 = 64

    ∴ missing term in series II = – 37 – 32 = – 69, – 69 – 64 = – 133
    ∴ missing term in series I = 370 – 69 = 301

     


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