Series Set – 16

1. 2, 6, 16, 40, 96, ?
A) 224
B) 204
C) 211
D) 235
E) 253

Answer & Explanation

 Option A
Pattern:
2 × 2 + 2 = 6,
6 × 2 + 4 = 16,
16 × 2 + 8 = 40,
40 × 2 + 16 = 96
96 × 2 + 32 = 224

 

2. 21, 10, 9, 12, 22, ?
A) 55.5
B) 64.5
C) 54.5
D) 52.5
E) 68.5

Answer & Explanation

 Option D
Pattern:  
21 × 0.5 – 0.5 = 10,
10 × 1 – 1 = 9,
9 × 1.5 – 1.5 = 12,
12 × 2 – 2 = 22,
22 × 2.5 – 2.5 = 52.5

 

3. 15, 29, 27, 53, 51, ?
A) 112
B) 101
C) 114
D) 120
E) 132

Answer & Explanation

 Option B
Pattern:
15 × 2 – 1 = 29,
29 × 1 – 2 = 27,
27 × 2 – 1 = 53,
53 × 1 – 2 = 51,
51 × 2 – 1 = 101

 

4. 3, 3, 6, 18, 84, ?
A) 555
B) 405
C) 235
D) 696
E) 485

Answer & Explanation

 Option D
Pattern:
3 × 0.5 + 1.5 = 3,
3 × 1 + 3 = 6,
6 × 2 + 6 = 18,
18 × 4 + 12 = 84,
84 × 8 + 24 = 696   

 

5. 22, 12, 8, 21, 26, ?
A) 95
B) 90
C) 40
D) 58
E) 63

Answer & Explanation

 Option B
Pattern:
22 * 0.5 + 12  = 12
12 * 1 – 22  = 8
8 * 1.5 + 32  = 21
21 * 2 – 42  = 26
26 * 2.5 + 52 = 90

 

 

6. 4, 6, 24, 130, 924, ?
A) 7125
B) 6129
C) 5257
D) 8334
E) 3652

Answer & Explanation

 Option D
Pattern:
*1 + 2, *3 + 6, *5 + 10, *7 + 14, *9 + 18

 

 

7. 26, 13, 20, 51, 180, ?
A) 812
B) 728
C) 731
D) 624
E) 835

Answer & Explanation

 Option A
Pattern:
*0.5 + 0, *1.5 + 0.5, *2.5 + 1, *3.5 + 1.5, *4.5 + 2

 

 

8.15, 28, 87, 344, 1725, ?
A) 10376
B) 10324
C) 10344
D) 10402
E) 10444

Answer & Explanation

 Option C
Pattern:
*2 – 2, *3 + 3, *4 – 4, *5 + 5, *6 – 6

 

 

9. 5, 6, 7.5, 9.75, ?, 18.4275
A) 15.3525
B) 13.1625
C) 14.9125
D) 14.4725
E) 15.2225

Answer & Explanation

 Option B
Pattern:
*1.2, *1.25, *1.3, *1.35, *1.4

 

 

10. 56, 60, 51, 67, 42, ?
A) 70
B) 88
C) 53
D) 62
E) 78

Answer & Explanation

 Option E
Pattern:
+ 22, – 32, + 42, – 52, + 62

 

 

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