Aptitude Questions – Number Series Set 63

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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. 1, 3, 5, 13, ?, 108
   1. 55
   2. 45
   3. 65
   4. 34
   5. 25
   

   Answer & Explanation

   Answer – 4. 34
   Explanation :
   1 * 1 + 1 + 1 = 3
   3 * 1.5 + 1.5 – 1 = 5
   5 * 2 + 2 + 1 = 13
   13 * 2.5 + 2.5 – 1 = 34
   34 * 3 + 3 + 1 = 106
   
   
2. 6 8 21 69 ? 1435
   1.235
   2.285
   3.294
   4.234
   5.245
   

   Answer & Explanation

   Answer – 2.285
   Explanation :
   6*1 – 1 + 2 + 1 = 8
   8*2 – 2 + 4 + 3 = 21
   21*3 – 1 + 2 + 5 = 69
   69*4 – 2 + 4 + 7 = 285
   285*5 – 1 + 2 + 9 = 1435
   
   
3. 2, 6, 15, ?, 111, 378
   1.38
   2.27
   3.56
   4.44
   5.62
   

   Answer & Explanation

   Answer – 2.27
   Explanation :
   2 + 1² + 1 + 2 = 6
   6 + 2² + 1 + 4 = 15
   15 + 4² + 1 + 6 = 38
   38 + 8² + 1 + 8 = 111
   111 + 16² + 1 + 10 = 378
   
   
4. 4, 8, 14, 36, ?, 300
   1.99
   2.97
   3.94
   4.98
   5.96
   

   Answer & Explanation

   Answer – 5.93
   Explanation :
   4 * 1 + 2 + 2 = 8
   8 * 1.5 + 4 – 2 = 14
   14 * 2 + 6 + 2 = 36
   36 * 2.5 + 8 – 2 = 96
   96 * 3 + 10 + 2 = 300
   
   
5. 3, ?, 13, 41, 87, 171
   1.9
   2.5
   3.6
   4.7
   5.2
   

   Answer & Explanation

   Answer – 4.7
   Explanation :
   3 + 1² + 3 = 7
   7 + 3² – 3 = 13
   13 + 5² + 3 = 41
   41 + 7² – 3 = 87
   87 + 9² + 3 = 171
   
   
6. 6, 6, 8, ?, 92, 276
   1.33
   2.53
   3.38
   4.24
   5.44
   

   Answer & Explanation

   Answer – 4.24
   Explanation :
   6*1 – 1 + 1 = 6
   6*2 – 2 – 2 = 8
   8*3 – 1 + 1 = 24
   24*4 – 2 – 2 = 92
   92*3 – 1 + 1 = 276
   
   
7. 2, 1, 13, 34, 106, ?
   1.232
   2.218
   3.221
   4.225
   5.242
   

   Answer & Explanation

   Answer – 3.221
   Explanation :
   2 + 1³ – 2 = 1
   1 + 2³ + 4 = 13
   13 + 3³ – 6 = 34
   34 + 4³ + 8 = 106
   
   
8. 1, 5, 21, 81, ?, 1309
   1.375
   2.329
   3.365
   4.383
   5.355
   

   Answer & Explanation

   Answer – 2.329
   Explanation :
   1 * 4 – 1 + 2 = 5
   5 * 4 + 3 – 2 = 21
   21 * 4 – 5 + 2 = 81
   81 * 4 + 7 – 2 = 329
   329 * 4 – 9 + 2 = 1309
   
   
9. 2, ?, 11, 17, 43, 81
   1.3
   2.5
   3.7
   4.8
   5.9
   

   Answer & Explanation

   Answer – 1.3
   Explanation :
   2*2 – 2 + 1 = 3
   3*2 + 4 + 1 = 11
   11*2 – 6 + 1 = 17
   17*2 + 8 + 1 = 43
   43*2 – 6 + 1 = 81
   
   
10. 2, 4, 4, 18, 64, ?
    1.340
    2.380
    3.330
    4.370
    5.320
    

    Answer & Explanation

    Answer – 3.330
    Explanation :
    2 * 1 + 2 = 4
    4 * 2 – 4 = 4
    4 * 3 + 6 = 18
    18 * 4 – 8 = 64
    64 * 5 + 10 = 330