Series Set – 8

1. 4, 9, 23, 74, 301, ?
A) 1946
B) 1436
C) 1510
D) 1481
E) 1741

Answer & Explanation

 Option C
Pattern: 

4 × 1 + 5 = 9,
9 × 2 + 5 = 23,
23 × 3 + 5 = 74,
74 × 4 + 5 = 301,
301 × 5 + 5 = 1510,

 

2. 5, 9, 25, 61, 125, ?
A) 179
B) 225
C) 266
D) 290
E) 168

Answer & Explanation

 Option B
Pattern: 

5 + 22 = 9,
9 + 42 = 25,
25 + 62 = 61,
61 + 82 = 125,
125 + 102 = 225,

 

3. 6, 14, 32, 72, 160, ?
A) 329
B) 320
C) 321
D) 352
E) 344

Answer & Explanation

 Option D
Pattern: 

6 × 2 + 2 = 14,
14 × 2 + 4 = 32,
32 × 2 + 8 = 72,
72 × 2 + 16 = 160,
160 × 2 + 32 = 352,

 

4. 13, 6, 5, 6, 10, ?
A) 22.5
B) 31.6
C) 45.2
D) 32.5
E) 33.2

Answer & Explanation

 Option A
Pattern: 

13 × 0.5 – 0.5 = 6,
6 × 1 – 1 = 5,
5 × 1.5 – 1.5 = 6,
6 × 2 – 2 = 10,
10 × 2.5 – 2.5 = 22.5

 

5. 7, 9, 21, 67, 273, ?
A) 1367
B) 1234
C) 1413
D) 1371
E) 1218

Answer & Explanation

 Option D
Pattern: 

7×1 + 2 = 9,
9×2 + 3 = 21,
21×3 + 4 = 67,
67×4 + 5 = 273,
273×5 + 6 = 1371

 

6. 8, 10, 17, 34, 66, ?
A) 157
B) 176
C) 199
D) 175
E) 118

Answer & Explanation

 Option E
Pattern: 

 

7. 5, 14, 11, 32, 29, ?
A) 57
B) 86
C) 45
D) 78
E) 92

Answer & Explanation

 Option B
Pattern: 

5 × 3 – 1 = 14,
14 × 1 – 3 = 11,
11 × 3 – 1 = 32,
32 × 1 – 3 = 29,
29 × 3 – 1 = 86

 

8. 27, 34, 51, 62, 83, ?
A) 99
B) 102
C) 111
D) 98
E) 144

Answer & Explanation

 Option D
Pattern: 

52 + 2, 62 – 2, 72 + 2, 82 – 2,
92 + 2, 102 – 2

 

9. 3, 13, 35, 113, ?, 2301
A) 335
B) 427
C) 459
D) 531
E) 643

Answer & Explanation

 Option C
Pattern: 

3 × 1 + 10 = 13,
13 × 2 + 9 = 35,
35 × 3 + 8 = 113,
113 × 4 + 7 = 459,
459 × 5 + 6 = 2301

 

10. 1, 2, 5, 16, ?, 632
A) 76
B) 107
C) 123
D) 98
E) 121

Answer & Explanation

 Option A
Pattern: 

1 × 0.5 + 1.5 = 2,
2 × 1 + 3 = 5,
5 × 2 + 6 = 16,
16 × 4 + 12 = 98,
76 × 8 + 24 = 632

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