NUMBER SERIES 1:

1. 4, 5, 6, 14, ?, 100.5
   1. 32.5
   2. 47.5
   3. 67.5
   4. 37.5
   5. 27.5
   
   Answer – 1. 32.5
   Explanation :
   4 * 1 + 1 = 5
   5 * 1.5 – 1.5= 6
   6 * 2 + 2 = 14
   14 * 2.5 – 2.5 = 32.5
   32.5 * 3 + 3 = 100.5
   
   
2. 8 4 4 8 32 ?
   1.354
   2.384
   3.294
   4.234
   5.256
   
   Answer – 5.256
   Explanation :
   8 * 0.5 = 4
   4 * 1 = 4
   4 * 2 = 8
   8 * 4 = 32
   32 * 8 = 256
   
   
3. 2, 2, 7, ?, 87, 342
   1.21
   2.26
   3.23
   4.24
   5.22
   
   Answer – 5.22
   Explanation :
   2 + 1² – 1 = 2
   2 + 2² + 1= 7
   7 + 4² – 1= 22
   
   
4. 6, 8, 8, 22, ?, 151
   1.43
   2.42
   3.44
   4.47
   5.48
   
   Answer – 4.47
   Explanation :
   6 * 1 + 2 = 8
   8 * 1.5 – 4 = 8
   8 * 2 + 6 = 22
   22 * 2.5 – 8 = 47
   47 * 3 + 10 = 151
   
   
5. 4, ?, 14, 40, 88, 170
   1.9
   2.5
   3.6
   4.7
   5.2
   
   Answer – 3.6
   Explanation :
   4 + 1² + 1= 6
   6 + 3² – 1= 14
   14 + 5² + 1= 40……..
   
   
6. 6, 6, 7, ?, 91, 463
   1.33
   2.43
   3.38
   4.25
   5.44
   
   Answer – 4.25
   Explanation :
   6*1 – 1 + 1 = 6
   6*2 – 2 – 3 = 7
   7*3 – 1 + 5 = 25
   
   
7. 2, 5, 17, 50, 122, ?
   1.252
   2.258
   3.257
   4.225
   5.242
   
   Answer – 3.257
   Explanation :
   2 + 1³ + 2 = 5
   5 + 2³ + 4 = 17
   17 + 3³ + 6 = 50
   50 + 4³ + 8 = 122
   
   
8. 2, 9, 39, 161, ?, 2613
   1.675
   2.670
   3.665
   4.651
   5.655
   
   Answer – 4.651
   Explanation :
   2 * 4 + 1 = 9
   9 * 4 + 3 = 39
   39 * 4 + 5 = 161
   161 * 4 + 7 = 651
   651 * 4 + 9 = 2613
   
   
9. 5, ?, 20, 34, 76, 142
   1.4
   2.5
   3.7
   4.8
   5.9
   
   Answer – 4.8
   Explanation :
   5*2 – 2 = 8
   8*2 + 4 = 20
   20*2 – 6 = 34
   
   
10. 5, 6, 8, 30, 136, ?
    1.645
    2.680
    3.650
    4.690
    5.620
    
    Answer – 1.645
    Explanation :
    5 * 1 + 1 = 6
    6 * 2 – 2 = 10
    10 * 3 + 3 = 33
    33 * 4 – 4 = 128
    128 * 5 + 5 = 645