Series Set – 14

1. 4, 15, 52, 157, 480, 1451
A) 1451
B) 480
C) 15
D) 52
E) 157

Answer & Explanation

 Option D
Pattern:
4×3 + 3 = 15
15×3 + 5 = 50
50×3 + 7 = 157
157×3 + 9 = 480
480×3 + 11 = 1451

 

2. 2, 11, 82, 569, 3410, 17050
A) 569
B) 17050
C) 11
D) 3410
E) 82

Answer & Explanation

 Option B
Pattern:  
2×9 – 7 = 11
11×8 – 6 = 82
82×7 – 5 = 569
569×6 – 4 = 3410
3410×5 – 3 = 17047

 

3. 3, 6, 12, 30, 108, 462
A) 12
B) 108
C) 6
D) 20
E) 462

Answer & Explanation

 Option B
Pattern:

 

4. 2, 4, 20, 48, 102, 188
A) 188
B) 102
C) 48
D) 4
E) 20

Answer & Explanation

 Option E
Pattern:
Difference of difference series.

 

5. 8, 17, 40, 133, 538, 2695
A) 2695
B) 17
C) 40
D) 538
E) 133

Answer & Explanation

 Option C
Pattern:
8×1 + 9 = 17
17×2 + 8 = 42
42×3 + 7 = 133
133×4 + 6 = 538
538×5 + 5 = 2695

 

6. 1025, 523, 257, 129, 65, 33
A) 33
B) 129
C) 257
D) 523
E) 65

Answer & Explanation

 Option D
Pattern:
÷2 + 0.5, ÷2 + 0.5, ÷2 + 0.5, ÷2 + 0.5, ÷2 + 0.5

 

7. 572, 284, 140, 58, 32, 14
A) 284
B) 58
C) 32
D) 14
E) 140

Answer & Explanation

 Option B
Pattern:
(572 – 4) ÷ 2 = 284
(284 – 4) ÷ 2 = 140
(140 – 4) ÷ 2 = 68
(68 – 4) ÷ 2 = 32
(32 – 4) ÷ 2 = 14

 

8. 6, 4, 8, 34, 230, ?
A) 2070
B) 2020
C) 2050
D) 2060
E) 2080

Answer & Explanation

 Option D
Pattern:
*1 – 2, *3 – 4, *5 – 6, *7 – 8, *9 – 10.

 

9. 10495, 1741, 549, 79, 21, 6
A) 21
B) 1741
C) 549
D) 79
E) 6

Answer & Explanation

 Option C
Pattern:
(10495 – 49) ÷ 6 = 1741
(1741 – 36) ÷ 5 = 341
(341 – 25) ÷ 4 = 79
(79 – 16) ÷ 3 = 21
(21 – 9) ÷ 2 = 6

 

10. 2, 8, 32, 265, 2932, 41068
A) 41068
B) 8
C) 2932
D) 32
E) 265

Answer & Explanation

 Option E
Pattern:
2 × 2 + 4 = 8
8 × 5 – 8 = 32
32 × 8 + 12 = 268
268 × 11 – 16 = 2932
2932 × 14 + 20 = 41068

 

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