BANK & INSURANCE (MISSING NUMBER SERIES PART 1)

Total Questions: 50

21. 900, 450, ?, 75, 25, 12.5

Correct Answer: (d) 150
Solution:Alternate ÷2, ÷3 ⇒ 450 ÷3 = 150.

22. 18, ?, 229, 3206, 3221, 51536

Correct Answer: (a) 216
Solution:Pattern: ×12, +13, ×14, +15, ×16 ⇒ 18×12=216.

23. 53, 60, 74, ?, 123, 158

Correct Answer: (b) 95
Solution:

Differences: +7, +14, +21, +28, +35 ⇒ missing = 74+21=95.

24. 157, 155, 111, 109, 73, ?

Correct Answer: (c) 71
Solution:Let's analyze:

157 - 2 = 155

155 - 44 = 111

111 - 2 = 109

109 - 36 = 73

73 - 2 = 71

The sequence of subtractions is: -2, -44, -2, -36, -2, ...

The even numbers are 44, 36, ... which are decreasing by 8:

44, 36, 28, ...

So next subtraction is -2:

73 - 2 = 71

25. 126, 135, ?, 209, 290, 411

Correct Answer: (d) 160
Solution:Add odd squares: +9, +25, +49, +81, +121 ⇒ missing = 135+25=160.

26. 1, ?, 21, 52, 105, 186

Correct Answer: (a) 6
Solution:

Pattern: n^3 − n(n−1):

1^3−0=1, 2^3−2=6, 3^3−6=21, 4^3−12=52, ... ⇒ missing = 6.

27. 74, 82, 93, ?, 124, 144

Correct Answer: (b) 107
Solution:Differences: +8, +11, +14, +17, +20 ⇒ missing = 93+14=107.

28. 2310, 1155, ?, 77, 11, 1

Correct Answer: (c) 385
Solution:Divide by primes: ÷2, ÷3, ÷5, ÷7, ÷11 ⇒ missing = 1155 ÷3 = 385.

29. 32640, 3264, ?, 68, 17, 8.5

Correct Answer: (a) 408
Solution:Divide by 10, 8, 6, 4, 2 ⇒ missing = 3264 ÷8 = 408.

30. 3, 9, 31, ?, 651, 3913

Correct Answer: (b) 129
Solution:Pattern: ×2+3, ×3+4, ×4+5, ×5+6, ×6+7 ⇒ missing = 31×4+5=129.