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Aptitude Questions – Number Series – Set 68[IBPS PO Prelim 2017]

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Hello Aspirants.

Welcome to Online Quantitative Aptitude Section in AffairsCloud.com. Here we are creating question sample in Number Series based on latest pattern, which is common for SBI,IBPS, RBI,LIC, NICL and other  competitive exams.

  1. 32, ?, 1024, 2048, 2048
    1. 324
    2. 256
    3. 224
    4. 326
    5. 274
    Answer – 2. 256
    Explanation :
    32 * 8 = 256
    256 * 4 = 1024
    1024 * 2 = 2048

  2. 9, 5, 6, 10.5, 23 ?
    1. 50
    2. 65
    3. 70
    4. 55
    5. 60
    Answer – 5. 60
    Explanation :
    9 * 0.5 + 0.5 = 5
    5 * 1 + 1 = 6
    6 * 1.5 + 1.5 = 10.5
    10.5 * 2 + 2 = 23
    23 * 2.5 + 2.5 = 60

  3. 17, 98, 26, ?, 35, 80
    1. 79
    2. 69
    3. 89
    4. 59
    5. 49
    Answer – 3. 89
    Explanation :
    26 -17 = 9; 35 – 26 = 9
    98 – 9 = 89

  4. 2, 17, 89, 359, 1079, ?
    1. 2143
    2. 2152
    3. 2169
    4. 2159
    5. 2148
    Answer – 4. 2159
    Explanation :
    2 * 6 + 5 = 17
    17 * 5 + 4 = 89
    89 * 4 + 3 = 359
    359 * 3 + 2 = 1079
    1079 * 2 + 1 = 2159

  5. 7, 4.5 ,5.5, 12, 49,?
    1.393
    2.351
    3.362
    4.375
    5.364
    Answer – 1.393
    Explanation :
    7 × 0.5 + 1 = 4.5.
    4.5 × 1 + 1 = 5.5.
    5.5 × 2 + 1 = 12.
    12 × 4 + 1 = 49.
    49 × 8 + 1 = 393.

  6. 7, 7, 13, 37, 97, ?
    1. 237
    2. 247
    3. 217
    4. 227
    5. 257
    Answer – 3. 217
    Explanation :
    7 + 1³ – 1 = 7
    7 + 2³ – 2 = 13
    13 + 3³ – 3 = 37

  7. 1, 20, 58, 134, 286, ?
    1.600
    2.590
    3.580
    4.570
    5.560
    Answer – 2.590
    Explanation :
    1 * 2 + 18 = 20
    20 * 2 + 18 = 58
    58 * 2 + 18 = 134
    134 * 2 + 18 = 286

  8. 3, 5, 15, 45, 113, ?
    1.253
    2.263
    3.243
    4.651
    5.655
    Answer – 3.243
    Explanation :
    3 * 1³ + 1 = 5
    5 * 2³ + 2 = 15
    15 * 3³ + 3 = 45
    45 * 4³ + 4 = 113

  9. 3.25, 6.5, 19.5, 78, 390, ?
    1.2140
    2.2350
    3.2670
    4.2340
    5.2250
    Answer – 4.2340
    Explanation :
    3.25 * 2 = 6.5
    6.5 * 3 = 19.5
    19.5 * 4 = 78

  10. 68, 117, 61, 124, 54, ?
    1.141
    2.121
    3.151
    4.131
    5.111
    Answer – 4.131
    Explanation :
    68 – 7 = 61; 61 – 7 = 54
    124 + 7 = 131