Number Series Questions for SBI PO Exam

The official SBI PO Notification 2024 is expected to be released soon, and for candidates preparing for the exam, it is essential to focus on the core topics. One such subject is Quantitative Aptitude and an important topic is Number Series, which comes frequently in the exam and can be quite scored with the right approach. You can solve most of the Number Series questions with a clear understanding of the pattern. To strengthen your preparation, we have prepared a series of Number Series Questions for SBI PO Exam. The solutions to these questions are provided in detail, which will help you improve your understanding and approach so that you can solve this section with confidence during the exam.

Number Series Questions for SBI PO Exam

Number Series is an important and high scoring topic for SBI PO 2024 exam, in which 5 to 6 questions are asked every year. The Quantitative Aptitude section consists of a total of 35 questions covering various topics such as Arithmetic, Number Series, Approximation, Data Interpretation (DI) and Quadratic Equations. By paying special attention to Number Series and practicing it regularly, you can enhance your understanding and increase your score. Regular practice of Number Series questions will not only increase your marks but also strengthen your preparation. Here are the top questions of Number Series.

Directions (1 – 10): In each of these questions a number series is given. In each series only one number is wrong. Find out the wrong number.

 Q1. 15, 22, 6, 30, – 2, 38, -10
(a) 15
(b) 22
(c) 6
(d) -2
(e) 38

Q2. 18,5,9,9.5,23,54.5,164.5
(a) 54.5
(b) 18
(c) 5
(d) 9
(e) 164.5

Q3. 102,158,218,282,350,422,500
(a) 102
(b) 218
(c) 350
(d) 500
(e) 422

Q4. 72,52,42,30,20,12,6
(a) 72
(b) 42
(c) 30
(d) 6
(e) 52

Q5. 125, 164, 284, 484, 764, 1124
(a) 120
(b) 125
(c) 116
(d) 108
(e) 136

Q6. 375, 384, 394, 410, 434, 468, 514
(a) 384
(b) 514
(c) 394
(d) 375
(e) 434

Q7. 248, 250, 279, 295, 420, 456, 799.
(a) 279
(b) 250
(c) 295
(d) 456
(e) 799

Q8. 16, 22, 28, 40, 56, 76, 100
(a) 22
(b) 28
(c) 56
(d) 16
(e) 40

Q9. 6, 8, 18, 57, 232, 1165, 6996
(a) 57
(b) 8
(c) 6996
(d) 1165
(e) 6

Q10. 15, 14, 26, 75, 296, 1485, 8844
(a) 15
(b) 75
(c) 296
(d) 26
(e) 1485

Directions (11 – 20) : In each of these questions a number series is given. Find what comes at the place of question (?) mark.

Q11. 11, 13, 17, 25, 41, ?
(a) 73
(b) 79
(c) 82
(d) 90
(e) 68

Q12. 21, ?, 46, 66, 91, 121
(a) 39
(b) 31
(c) 29
(d) 27
(e) 33

Q13. 3, 6, 14, 38, ?, 206
(a) 154
(b) 126
(c) 86
(d) 112
(e) 72

Q14. 2, 12, ?, 240, 720, 1440
(a) 72
(b) 84
(c) 36
(d) 60
(e) 48

Q15. 3, 6, ?, 42, 123, 366
(a) 12
(b) 24
(c) 15
(d) 18
(e) 21

Q16. 11, 16.5, 22, 27.5, ?, 38.5
(a) 34.5
(b) 32
(c) 30.5
(d) 31.5
(e) 33

Q17. 390, 300, 244, 214, ?, 200
(a) 210
(b) 208
(c) 206
(d) 204
(e) 202

Q18. ?, 45, 36, 43, 34, 41
(a) 38
(b) 28
(c) 36
(d) 54
(e) 27

Q19. 7, 25, ?, 69, 99, 137
(a) 39
(b) 58
(c) 62
(d) 45
(e) 57

Q20. 761, 592, 448, 327, ?, 146
(a) 302
(b) 264
(c) 292
(d) 276
(e) 227

Solutions

S1. Ans.(a)
Sol. Pattern of series
Wrong number = 15
14+8=22
22-16=6
6+24=30
30 -32= -2
-2+40 =38
38-48 = -10

S2. Ans.(a)
Sol. Pattern of series
Wrong number = 54.5
18×0.5-4=5
5×1+4=9
9×1.5-4=9.5
9.5×2+4=23
23×2.5-4=53.5
53.5×3+4=164.5

S3. Ans.(d)
Sol. Pattern of series
Wrong number = 500
102+56=158
158+60=218
218+64=282
282+68=350
350+72=422
422+76=498

S4. Ans.(e)
Sol. Pattern of series
Wrong number = 52
8×9=72
7×8=56
6×7=42
5×6=30
4×5=20
3×4=12
2×3=6

S5. Ans.(b)
Sol. Pattern of series
Wrong number = 125
124+(40×1)=164
164+(40×3)=284
284+(40×5)=484
484+(40×7)=764
764+(40×9)=1124

S6. Ans.(d)
Sol. Wrong number = 375.

there will be 378 in place of 375.

S7. Ans.(b)
Sol. Wrong number = 250.

there will be 252 in place of 250.

S8. Ans.(a)
Sol. Wrong number = 22
Pattern of series –
16+4=20
20+8=28
28+12=40
40+16=56
56+20=76
76+24=100

S9. Ans.(e)
Sol. Wrong number = 6
Pattern of series –
7×1+1=8
8×2+2=18
18×3+3=57
57×4+4=232
232×5+5=1165
1165×6+6=6996

S10. Ans.(e)
Sol. Wrong number = 1485
Pattern of series –
15×1-1 = 14
14×2-2 = 26
26×3-3 = 75
75×4-4 = 296
296×5-5 = 1475
1475 ×6-6=8844

S11. Ans.(a)
Sol. The pattern of the series-
11+2=13
13+4=17
17+8=25
25+16=41
41+32=73

S12. Ans.(b)
Sol. The pattern of the series-
21+10=31
31+15=46
46+20=66
66+25=91
91+30=121

S13. Ans.(c)
Sol. The pattern of the series-
3+(2²-1)=6
6+(3²-1)=14
14+(5²-1)=38
38+(7²-1)=86
86+(11²-1)=206

S14. Ans.(d)
Sol. The pattern of the series-
2×6=12
12×5=60
60×4=240
240×3=720
720×2=1440

S15. Ans.(c)
Sol. The pattern of the series-
3×3-3=6
6×3-3=15
15×3-3=42
42×3-3=123
123×3-3=366

S16. Ans.(e)
Sol. The pattern of the series-
11+5.5=16.5
16.5+5.5=22
22+5.5=27.5
27.5+5.5=33
33+5.5=38.5

S17. Ans.(e)
Sol. The pattern of the series-
390-(10×9)=300
300-(8×7)=244
244-(6×5)=214
214-(4×3)=202
202-(2×1)=200

S18. Ans.(a)
Sol. The pattern of the series-
38+7=45
45-9=36
36+7=43
43-9=34
34+7=41

S19. Ans.(d)
Sol.

S20. Ans.(e)
Sol. The pattern of the series-
761-13²=592
592-12²=448
448-11²=327
327-10²=227
227-9²=146