Number Series Questions
Nowadays, almost in all competitive exams sequence questions and answers are asked and especially in Bank Recruitment Exams.
Most Bank PO Exams including IBPS PO, SBI PO, and other exams ask 5-10 questions from Number Series like find the next number in the series. It is very important to practice difficult number series questions, as they can generally be solved in short span of time with high accuracy. If you learn that how to solve number series problems quickly you may easily get 5 to 10 marks. Today, we have 20 difficult number series questions to help you practice Number Series. As usual, answers and solution are following the questions.
Following are some Number Series questions which are likely to be asked/ already asked in competitive exams, while practicing you may learn shortcuts to solve number series problems and series questions tricks. Following Number Series questions will help you securing good marks in upcoming SBI PO, SBI Clerk, IBPS PO, IBPS Clerk, IBPS RRB Exams in 2017 2018.
Most Bank PO Exams including IBPS PO, SBI PO, and other exams ask 5-10 questions from Number Series like find the next number in the series. It is very important to practice difficult number series questions, as they can generally be solved in short span of time with high accuracy. If you learn that how to solve number series problems quickly you may easily get 5 to 10 marks. Today, we have 20 difficult number series questions to help you practice Number Series. As usual, answers and solution are following the questions.
Following are some Number Series questions which are likely to be asked/ already asked in competitive exams, while practicing you may learn shortcuts to solve number series problems and series questions tricks. Following Number Series questions will help you securing good marks in upcoming SBI PO, SBI Clerk, IBPS PO, IBPS Clerk, IBPS RRB Exams in 2017 2018.
Number Series Questions and Answers
Directions (1 - 2) : What will come inplace of the question mark (?) in each of the following number series?
1. 11 23 47 95 ?
1. 11 23 47 95 ?
(1) 189
(2) 193
(3) 181
(4) 195
(5) None of these
2. 9 17 33 65 ?
(1) 113
(2) 131
(3) 129
(4) 118
(5) None of these
Directions (3 - 4) : In the following number series only one number is wrong. Find out the wrong number.
3. 8 11 17 47 128 371 1100
(1) 11
(2) 47
(3) 17
(4) 371
(5) 128
4. 1 5 13 31 61 125 253
(1) 1
(2) 5
(3)31
(4) 61
(5) 125
Directions (5 - 9) : In the following number series a wrong number is given. Find out the wrong number.
5. 150 290 560 1120 2140 4230 8400
(1) 2140
(2) 560
(3) 1120
(4) 4230
(5) 290
6. 10 8 13 35 135 671 4007
(1) 8
(2) 671
(3) 135
(4) 13
(5) 35
7. 80 42 24 13.5 8.75 6.375 5.1875
(1) 8.75
(2) 13.5
(3) 24
(4) 6.375
(5) 42
8. 125 75 45 25 16.2 9.72 5.832
(1) 25
(2) 45
(3) 9.72
(4) 16.2
(5) 75
9. 29 37 21 43 13 53 5
(1) 37
(2) 53
(3) 13
(4) 21
(5) 43
Directions (10 - 14): In the following number series only one number is wrong. Find out the wrong number.
10. 13 25 40 57 79 103 130
(1) 25
(2) 40
(3) 57
(4) 79
(5) None of these
11. 850 600 550 500 475 462.5 456.25
(1) 600
(2) 550
(3) 500
(4) 462.5
(5) None of these
12. 2 10 18 54 162 486 1458
(1) 18
(2) 54
(3) 162
(4) 10
(5) None of these
13. 8 12 24 46 72 108 152
(1) 12
(2) 24
(3) 46
(4) 72
(5) None of these
14. 142 119 100 83 65 59 52
(1) 65
(2) 100
(3) 59
(4) 119
(5) None of these
Directions (15 - 19) : What should come in place of the question mark in the following number series?
15. 5 54 90 115 131 140 ?
(1) 149
(2) 146
(3) 142
(4) 152
(5) None of these
16. 7 4 5 9 ? 52.5 160.5
(1) 32
(2) 16
(3) 14
(4) 20
(5) None of these
17. 6 42 ? 1260 5040 15120 30240
(1) 546
(2) 424
(3) 252
(4) 328
(5) None of these
18. 4 10 40 190 940 ? 23440
(1) 4690
(2) 2930
(3) 5140
(4) 3680
(5) None of these
19. 2 9 30 ? 436 2195 13182
(1) 216
(2) 105
(3) 178
(4) 324
(5) None of these
Directions (20) : In each question below, a number series is given in which one number is wrong. Find out the wrong number.
20. 484 240 120 57 26.5 11.25 3.625
(1) 240
(2) 120
(3) 57
(4) 26.5
(5) 11.25
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Number Series For Bank PO Solutions
1. (5) The pattern is :
11 × 2 + 1 = 23
23 × 2 + 1 = 47
47 × 2 + 1 = 95
95 × 2 + 1 = 191
2. (3) The pattern is :
9 × 2 - 1 = 17
17 × 2 - 1 = 33
33 × 2 - 1 = 65
65 × 2 - 1 = 129
5. (3) The pattern is :
5. (3) The pattern is :
150 × 2 - 1 × 10 = 300 - 10 = 290
290 × 2 - 2 × 10 = 580 - 20 = 560
560 × 2 - 3 × 10 = 1120 - 30 = 1090 ≠ 1120
1090 × 2 - 4 × 10 = 2180 - 40 = 2140
2140 × 2 - 5 × 10 = 4280 - 50 = 4230
6. (2) The pattern is : 10 × 1 - 2 = 8
8 × 2 - 3 = 13
13 × 3 - 4 = 35
35 × 4 - 5 = 135
135 × 5 - 6 = 675 - 6 = 669 ≠ 671
669 × 6 - 7 = 4014 - 7 = 4007
7. (3) The pattern is :
(80 ÷ 2) + 2 = 40 + 2 = 42
(42 ÷ 2) + 2 = 21 + 2 = 23 ≠ 24
(23 ÷ 2) + 2 = 11.5 + 2 = 13.5
(13.5 ÷ 2) + 2 = 6.75 + 2 = 8.75
(8.75 ÷ 2) + 2 = 4.375 + 2 = 6.375
8. (1) The pattern is :
125 × 3/5 = 75
75 × 3/5 = 45
45 × 3/5 = 27 ≠ 25
27 × 3/5 = 16.2
16.2 × 3/5 = 9.72
9. (5) The pattern is :
29 + 1 × 8 = 37
37 - 2 × 8 = 37 - 16 = 21
21 + 3 × 8 = 21 + 24 = 45 ≠ 43
45 - 4 × 8 = 45 - 32 = 13
13 + 5 × 8 = 13 + 40 = 53
53 - 6 × 8 = 53 - 48 = 5
10. (3) The pattern is:
13 + 12 = 25
25 + 15 = 40
40 + 18 = 58 ≠ 57
58 + 21 = 79
11. (1) The pattern is :
850 - 200 = 650 ≠ 600
650 - 100 = 550
550 - 50 = 500
500 - 25 = 475
475 - 12.5 = 462.5
12. (4) The pattern is:
2 × 3 = 6 ≠ 10
6 × 3 = 18
18 × 3 = 54
54 × 3 = 162
13. (3) The pattern is:
8 + 4 × 1 = 12
12 + 4 × 3 = 24
24 + 4 × 5 = 44 ≠ 46
44 + 4 × 7 = 72
72 + 4 × 9 = 108
14. (1) The pattern is :
142 - 23 = 119
119 - 19 = 100
100 - 17 = 83
83 - 13 = 70 ≠ 65
70 - 11 = 59
59 - 7 = 52
15. (5) The pattern is :
5 + 7² = 54
54 + 6² = 90
90 + 5² = 115
115 + 4² = 131
131 + 3² = 140
140 + 2² = 140 + 4 = 144
16. (4) The pattern is :
7 × 0.5 + 0.5 = 3.5 + 0.5 = 4
4 × 1 + 1 = 4 + 1 = 5
5 × 1.5 + 1.5 = 7.5 + 1.5 = 9
9 × 2 + 2 = 18 + 2 = 20
17. (3) The pattern is :
6 × 7 = 42
42 × 6 = 252
252 × 5 = 1260
18. (1) The pattern is:
4 × 5 - 10 = 10
10 × 5 - 10 = 40
40 × 5 - 10 = 190
190 × 5 - 10 = 940
940 × 5 - 10 = 4700 - 10 = 4690
19. (2) The pattern is :
2 × 1 + 1 × 7 = 9
9 × 2 + 2 × 6 = 30
30 × 3 + 3 × 5 = 105
105 × 4 + 4 × 4 = 436
436 × 5 + 5 × 3 = 2195
20. (2) The pattern of the numbe series is :
(484 ÷ 2) - 2 = 242 - 2 = 240
(240 ÷ 2) - 2 = 120 - 2 = 118 = 120
(118 ÷ 2) - 2 = 59 - 2 = 57
(57 ÷ 2) - 2 = 28.5 - 2 = 26 5