Series Set – 30

1. 17, 289, 425, 490, 527, 544
A) 289
B) 425
C) 490
D) 527
E) 504

Answer & Explanation

 Option C
Pattern:
17+ 272 = 289
289 + (272/2) = 425
425 + (136/2) = 493
493 + (68/2) =527
527 + (34/2) = 544

 

2. 8, 10, 22, 52, 108, 193, 308
A) 10
B) 22
C) 52
D) 108
E) 193

Answer & Explanation

  Option E
Pattern:  
8 + 1 × 2 = 10
10 + 3 × 4 =22
22 + 5 × 6 = 52
52 + 7 × 8 = 108
108 + 9 × 10 = 198
198 + 10 × 11 = 308

 

3. 6, 4, 5, 13, 39, 189, 1127
A) 4
B) 5
C) 13
D) 39
E) 189

Answer & Explanation

  Option C
Pattern:
6 × 1 – 2 = 4
4 × 2 – 3 = 5
5 × 3 – 4 = 11
11 × 4 – 5 =39
39 × 5 – 6 =189
189 × 6 – 7 = 1127

 

4. 8, 10, 14, 28, 58, 113, 2014
A) 10
B) 14
C) 28
D) 58
E) 113

Answer & Explanation

 Option A
Pattern:
8 + 1 (=0 + 1²) = 9
9 + 5 (=1 + 2²) = 14
14 + 14 (=5 + 3²) = 28
28 + 30 (= 14 + 4²) = 58
58 + 55 (=30 + 5²) = 113
113 + 91 (=55 + 6²) = 204

 

5. 19, 28, 55, 104, 163, 244, 343
A) 28
B) 55
C) 104
D) 163
E) 244

Answer & Explanation

  Option C
Pattern:
19 + 1 × 9  = 28
28 + 3 × 9 = 55
55 + 5 × 9 = 100
100 + 7 × 9 = 163
163 + 9 × 9 = 244
244 + 11 × 9 = 343

 

6. 2, 13, 69, 285, 871, 1667, 1803
A) 13
B) 69
C) 285
D) 871
E) 1667

Answer & Explanation

 Option E
Pattern:
2 × 6 + 1² = 13
13 × 5 + 2² = 69
69 × 4 + 3² = 285
285 × 3 + 4² = 871
871 × 2 + 5² = 1767
1767× 1 + 6² = 1803 

 

7. 5, 12, 38, 135, 598, 2875, 17292
A) 12
B) 38
C) 135
D) 598
E) 2875

Answer & Explanation

 Option D
Pattern:
5 × 1 + 1 × 7 =  12
12 × 2 + 2 × 7 = 38
38 × 3 + 3 × 7 = 135
135 × 4 + 4 × 7 = 568
568 × 5 + 5 × 7 = 2875
2875 × 6 + 6 ×7 = 17292

 

8. 4008, 1335, 450, 147, 48, 15, 4
A) 1335
B) 450
C) 147
D) 48
E) 15

Answer & Explanation

 Option B
Pattern:
4008/3 – 1 = 1335
1335/3 – 1 = 444
444/3 – 1 = 147
147/3 – 1 = 48
48/3 – 1 = 15
15/3 – 1 = 4

 

9. 4, 6, 18, 88, 524, 4222
A) 6
B) 18
C) 88
D) 524
E) 4222

Answer & Explanation

 Option C
Pattern:
4 × 0 + 1 × 2 = 6
6 × 2 + 2 × 3 = 18
18 × 4 + 3 × 4 = 84
84 × 6 + 4 × 5 = 524
524 × 8 + 5 × 6 = 4222

 

10. 5, 6, 18, 57, 244, 1245, 7506
A) 6
B) 18
C) 57
D) 244
E) 1245

Answer & Explanation

  Option B
Pattern:
5 × 1 + 1 ²= 6
6 × 2 + 2² = 16
16 × 3 + 3² = 57
57 × 4 + 4² = 244
244 × 5 + 5²= 1245
1245 × 6 + 6²= 7506

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