Number Series Practice Questions for IBPS, SBI and other bank exams
Directions (1 – 5): Find the wrong term in the
following number series:
1. 7
37 91 167
271 397
A) 37
B) 91
C) 167
D) 271
E) 397
2. 8.1, 9.2, 17.3, 26.5, 43.8, 71.5, 114.1
A) 17.3
B) 26.5
C) 43.8
D) 9.2
E) None of these
3. 4015, 4395, 4140, 4272, 4265, 4145
A) 4272
B) 4395
C) 4265
D) 4145
E) 4015
4. 8
56 152 276
488 728
A) 56
B) 276
C) 152
D) 488
E) 728
5. 2
8 17 29
44 60 83
107
A) 60
B) 44
C) 29
D) 83
E) 17
Directions (6 – 10): What should come in place of
the question mark (?) in the following number series?
6. 949
189.8 ? 22.776 11.388 6.8328
A) 48.24
B) 53.86
C) 74.26
D) 56.94
E) None of these
7. 5963
? 5938 5913
5877 5828
A) 5932
B) 5940
C) 5951
D) 5954
E) None of these
8. 7
33 137 553 ? 8873
A) 1217
B) 2217
C) 2117
D) 2127
E) None of these
9. 88,
?, 264, 660, 1980, 6930, 27720
A) 124
B) 120
C) 132
D) 224
E) 111
10. 1,
3, 10, 29,
74, ?, 382
A) 173
B) 154
C) 189
D) 212
E) 222
Solutions:
1. C) The given series is in the pattern:
→ 7 = 23 –
13
→ 37 = 43 –
33
→ 91 = 63 –
53
→ 167 ≠ 83 –
73 = 169
→ 271 = 103 –
93
→ 397 = 123 –
113
So, the wrong term in the
series is 167.
2. E) The
pattern of the given series is:
→ 8.1,
→ 9.2,
→ 17.3 = 9.2 + 8.1,
→ 26.5 = 17.3 + 9.2,
→ 43.8 = 26.5 + 17.3,
Here the following number
is the sum of previous two numbers
∴ Next term should be:
→ 70.3 = 43.8 + 26.5,
Wrong term is 71.5
→ 114.1 = 70.3 + 43.8
3. A) The
above series follows the pattern of alternate terms forming a series:
4015 + 125 = 4140
4395 – 125 = 4270
4140 + 125 = 4265
4270 – 125 = 4145
4140 + 125 = 4265
Hence, the wrong term is
4272.
4. B) The
given series is in the pattern:
→ 8 = 23 –
03
→ 56 = 43 –
23
→ 152 = 63 –
43
→ 276 ≠ 83 –
63 = 296
→ 488 = 103 –
83
→ 728 = 123 –
103
So, the wrong term in the
series is 276.
5. A) The
given series is in following pattern:
2
2 + 3 × 2 = 8
8 + 3 × 3 = 17
17 + 3 × 4 = 29
29 + 3 × 5 = 44
44 + 3 × 6 = 62 ≠ 60
62 + 3 × 7 = 83
83 + 3 × 8 = 107
So, the wrong term is 60.
6. D) The
pattern that the series is following can be shown easily in a diagram:
Thus the unknown number
is 189.8 ÷ 10/3 = 56.94
7. D) The
given series is,
→ 5963,
→? = 5963 – 32 =
5954,
→ 5938 = 5954 – 42,
→ 5913 = 5938 – 52,
→ 5877 = 5913 – 62,
→ 5828 = 5877 - 72
∴ ? = 5954
8. B) The
given series is,
→ 7,
→ 33 = 7 + 13 × 2,
→ 137 = 33 + 13 × 23,
→ 553 = 137 + 13 × 25,
→? = 553 + 13 × 27 =
2217,
→ 8873 = 2217 + 13 × 29
∴? = 2217
9. C) The
pattern of the given number series is as following:
→ 88,
→ 88 × 1.5 = 132,
→ 132 × 2 = 264,
→ 264 × 2.5 = 660,
→ 660 × 3 = 1980,
→ 1980 × 3.5 = 6930,
→ 6930 × 4 = 27720
Hence, the required term
in place of question mark in the given number series is 132.
10. A) The
pattern of the given number series is as following-
→ 1
→ 1 × 2 + 12 =
3,
→ 3 × 2 + 22 =
10,
→ 10 × 2 + 32 =
29,
→ 29 × 2 + 42 =
74,
→ 74 × 2 + 52 =
173,
→ 173 × 2 + 62 =
382
Hence, the required
number in the place of the question mark is 173.
