BANK & INSURANCE (WRONG NUMBER SERIES PART 2)

Total Questions: 50

1. 12, 18, 14, 36, 16, 75, 18

Correct Answer: (a) 75
Solution:Alternate pattern: 12, 14, 16, 18 => inc by 2

Check 2nd part:

18 × 2 = 36

36 × 2 = 72

75 is wrong.

2. 21, 25, 37, 54, 85, 121

Correct Answer: (b) 54
Solution:Difference :

25 − 21 = 4
37 − 25 = 12
54 − 37 = 17
85 − 54 = 31
121 − 85 = 36

Pattern :

multiply by 4:

4 × 1 = 4
4 × 3 = 12
4 × 5 = 20
4 × 7 = 28
4 × 9 = 36

Correct Series:

21 + 4 = 25 ✔
25 + 12 = 37 ✔
37 + 20 = 57 ❌ (given 54)

57 + 28 = 85 ✔
85 + 36 = 121 ✔

54 is the wrong term.

3. 32, 38, 49, 63, 82, 107

Correct Answer: (c) 38
Solution:32 + 7 = 39 ≠ 38

38 is the wrong number, should be 39

39 + 10 = 49

49 + 14 = 63

63 + 19 = 82

82 + 25 = 107

4. 45, 61, 84, 122, 171, 235

Correct Answer: (d) 84
Solution:Difference follow pattern:

16 = 4²
25 = 5²
36 = 6²
49 = 7²
64 = 8²

Correct Series:

45 + 16 = 61 ✔
61 + 25 = 86 ❌ (given 84)

86 + 36 = 122 ✔
122 + 49 = 171 ✔
171 + 64 = 235 ✔

84 is the wrong term.

5. 86, 87, 91, 107, 171, 327

Correct Answer: (a) 327
Solution:Differences: 1, 4, 16, 64, 156
Should be powers of 4: 1,4,16,64,256
327 wrong.
Wrong term: 327

6. 5, 8, 17, 24, 35, 48

Correct Answer: (b) 35
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 ❌ (given 35)
7² − 1 = 49 − 1 = 48 ✔

35 is the wrong term.

7. 20, 24, 32, 48, 70, 144

Correct Answer: (d) 70
Solution:Differences: 4, 8, 16, 22, 74
Should double: 4,8,16,32,64
70 wrong.
Wrong term: 70

8. 120, 91, 68, 49, 32, 19

Correct Answer: (d) None of these
Solution:Let's check the pattern:

120 - 29 = 91

91 - 23 = 68

68 - 19 = 49

49 - 17 = 32

32 - 13 = 19

Diffs: -29, -23, -19, -17, -13 => primes decreasing (Pattern fits)

There is no wrong term in the series.

9. 4620, 420, 60, 16, 4, 2

Correct Answer: (b) 16
Solution:Pattern seems to be dividing by decreasing prime numbers:

4620 ÷ 11 = 420 ✔
420 ÷ 7 = 60 ✔
60 ÷ 5 = 12 ❌ (given 16)

12 ÷ 3 = 4
4 ÷ 2 = 2

16 is the wrong term.

10. 1728, 1000, 522, 216, 64, 8

Correct Answer: (c) 522
Solution:Cubes: 12³=1728, 10³=1000, 8³=512, 6³=216, 4³=64, 2³=8
522 wrong (should be 512).
Wrong term: 522