BANK & INSURANCE (WRONG NUMBER SERIES PART 1)

Total Questions: 50

41. 8, 17, 33, 67, 123, 267

Correct Answer: (c) 123
Solution:Pattern: ×2+1, ×2-1 alternating
8×2+1=17
17×2-1=33
33×2+1=67
67×2-1=133 (not 123)
Wrong term: 123

42. 20, 62, 102, 138, 176, 210

Correct Answer: (d) 138
Solution:Differences: 42,40,36,38,34
Should decrease by 2: 42,40,38,36,34
138 wrong.

43. 11, 12, 20, 47, 109, 236

Correct Answer: (a) 109
Solution:Observe the pattern: 1³, 2³, 3³, 4³, 5³

Correct Series:

11 + 1 = 12
12 + 8 = 20
20 + 27 = 47
47 + 64 = 111
111 + 125 = 236

So correct series should be:

11, 12, 20, 47, 111, 236

109 is the wrong term.

44. 20, 10, 10, 15, 30, 90

Correct Answer: (b) 90
Solution:

Pattern:

×0.5
×1
×1.5
×2
×2.5

Check step by step now:

20 × 0.5 = 10 ✔

10 × 1 = 10 ✔

10 × 1.5 = 15 ✔

15 × 2 = 30 ✔

30 × 2.5 = 75 ❌

But given term is 90.

90 is the wrong term.

45. 22, 130, 216, 310, 382, 442

Correct Answer: (c) 216
Solution:Let's check:

22 + 12×9 = 22 + 108 = 130

130 + 12×8 = 130 + 96 = 226 ≠ 216

216 + 12×7 = 226 + 84 = 310

310 + 12×6 = 310 + 72 = 382

382 + 12×5 = 382 + 60 = 442

Wrong term is 216.

46. 178, 175, 169, 160, 152, 133

Correct Answer: (d) 152
Solution:Differences: -3,-6,-9,-8,-19
Should be -3,-6,-9,-12,-15
152 wrong.

47. 6, 14, 42, 105, 230, 446

Correct Answer: (b) 42
Solution:Let's check:
- 6 + 2³ = 6 + 8 = 14
- 14 + 3³ = 14 + 27 = 41 ≠ 42
- 41 + 4³ = 41 + 64 = 105
- 105 + 5³ = 105 + 125 = 230
- 230 + 6³ = 230 + 216 = 446

Pattern fits; 42 is the wrong number, should be 41.

48. 5, 10, 30, 120, 480, 3600

Correct Answer: (a) 480
Solution:Let's check the pattern:

- 5 × 2 = 10

- 10 × 3 = 30

- 30 × 4 = 120

- 120 × 5 = 600 ≠ 480

- 480 × 6 ≠ 3600 => 600 × 6 = 3600

Pattern fits; 480 is the wrong number, should be 600

49. 5, 8, 18, 24, 37, 48

Correct Answer: (c) 18
Solution:

2² + 1 = 4 + 1 = 5
3² − 1 = 9 − 1 = 8
4² + 1 = 16 + 1 = 17
5² − 1 = 25 − 1 = 24
6² + 1 = 36 + 1 = 37

So correct series should be:

5, 8, 17, 24, 37

18 is wrong.

50. 15, 23, 35, 51, 71, 85

Correct Answer: (d) 85
Solution:Differences: 8,12,16,20,14
Should increase by 4 each: 8,12,16,20,24
85 wrong.