Number Series Questions For IBPS PO SBI SSC
Nowadays, almost in all competitive exams Number Series related questions is must ask 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. It is very important to practice difficult number series questions, as they can generally be solved in short span of time with high accuracy. 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. 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. It is very important to practice difficult number series questions, as they can generally be solved in short span of time with high accuracy. 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. 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 with Solutions pdf
Directions (1 - 5): In the following number series, a wrong number is given. Find out that wrong number.
1. 2 11 38 197 1172 8227 65806
(1) 11
(2) 38
(3) 197
(4) 1172
(5) 8227
2. 16 19 21 30 46 71 107
(1) 19
(2) 21
(3) 30
(4) 46
(5) 71
3. 7 9 16 25 41 68 107 173
(1) 107
(2) 16
(3) 41
(4) 68
(5) 25
4. 4 2 3.5 7.5 26.25 118.125
(1) 118.125
(2) 26.25
(3) 3.5
(4) 2
(5) 7.5
5. 16 4 2 1.5 1.75 1.875
(1) 1.875
(2) 1.75
(3) 1.5
(4) 2
(5) 4
Directions (6 - 10): What will come in place of the question mark (?) in the following number series?
6. 3 10 32 100 ?
(1) 345
(2) 460
(3) 308
(4) 440
(5) None of these
7. 5 3 4 ? 38
(1) 8.5
(2) 6
(3) 7.5
(4) 8
(5) None of these
8. 5 6 ? 57 244
(1) 21
(2) 16
(3) 17
(4) 15
(5) None of these
9. 3 10 21 ? 51
(1) 34
(2) 32
(3) 33
(4) 37
(5) None of these
10. 5 11 ? 55 117
(1) 21
(2) 27
(3) 23
(4) 25
(5) None of these
Directions (11 - 15): In each of the following questions a number series is given. After the series, a number is given followed by (a), (b), (c), (d) and (e). You have to complete the series starting with the number given, following the sequence of the original series and answer the questions that follow the series.
11. 12 30 120 460 1368 2730
16 (a) (b) (c) (d) (e)
What will come in place of (d) ?
(1) 1384
(2) 2642
(3) 2808
(4) 1988
(5) None of these
12. 154 462 231 693 346.5 1039.5
276 (a) (b) (c) (d) (e)
What will come in place of (e) ?
(1) 1746
(2) 621
(3) 1242
(4) 983
(5) None of these
13. 7 91 1001 7007 35035 105
14.5 (a) (b) (c) (d) (e)
What will come in place of (c) ?
(1) 21132.5
(2) 14514.5
(3) 20020.5
(4) 13864.5
(5) None of these
14. 582 574 601 537 662 446
204 (a) (b) (c) (d) (e)
What will come in place of (d) ?
(1) 284
(2) 68
(3) 174
(4) 331
(5) None of these
15. 85 43 44 67.5 137 345
125 (a) (b) (c) (d) (e)
What will come in place of (c) ?
(1) 86
(2) 107.5
(3) 112.5
(4) 97.5
(5) None of these
Directions (16 - 22) : What will come in place of the question mark (?) in the following number series?
16. 1 ? 27 64 125
(1) 8
(2) 4
(3) 6
(4) 9
(5) None of these
17. 25 16 ? 4 1
(1) 3
(2) 6
(3) 12
(4) 18
(5) None of these
18. 1 6 36 240 1960 ?
(1) 19660
(2) 3680
(3) 36800
(4) 19600
(5) None of these
19. 12 14 17 13 8 14 21 13 4 ?
(1) 14
(2) 13
(3) 15
(4) 2
(5) None of these
20. 2 5 7 12 19 31 50 ?
(1) 53
(2) 81
(3) 69
(4) 74
(5) None of these
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Solution Answer Number Series Questions
1. (4) The series is based on the following pattern:
11 = 2 × 3 + 5
38 = 11 × 4 - 6
197 = 38 × 5 + 7
1172 ≠ 197 × 6 - 8
Hence 1172 is wrong and it should be replaced by 197 × 6 - 8 = 1174
2. (1) The series is based on the following pattern:
107 - 71 = 36 = 6²
71 - 46 = 25 = 5²
46 - 30 = 16 = 4²
30 - 21 = 9 = 3²
21 - 19 = 2 ≠ 2²
Hence 19 should be replaced by 17 for which 21 - 17 = 2²
3. (4) The series is based on the following pattern:
16 = 9 + 7
2. (1) The series is based on the following pattern:
107 - 71 = 36 = 6²
71 - 46 = 25 = 5²
46 - 30 = 16 = 4²
30 - 21 = 9 = 3²
21 - 19 = 2 ≠ 2²
Hence 19 should be replaced by 17 for which 21 - 17 = 2²
3. (4) The series is based on the following pattern:
16 = 9 + 7
25 = 16 + 9
41 = 25 + 16
68 ≠ 41 + 25
4. (3) The series is based on the following pattern:
Hence, 308 will come in place of the question mark.
7. (5) The given series is based on the following pattern:
Hence, 10 will come in place of question mark.
8. (2) The given series is based on the following pattern:
5 × 1 + (1)² = 6
6 × 2 + (2)² = 16
16 × 3 + (3)² = 57
57 × 4 + (4)² = 244
Hence, 16 will come in place of question mark.
9. (1) The given series is based on the following patterns.
Hence, 34 will come in place of the question mark.
10. (4) The given series is based on the following pattern:
5 × 2 + 1 = 11
11 × 2 + 3 = 25
25 × 2 + 5 = 55
55 × 2 + 7 = 117
11. (3) The given series is based on the following pattern:
30 = 12 × 6 - 7 × 6
120 = 30 × 5 - 6 × 5
460 = 120 × 4 - 5 × 4
1368 = 460 × 3 - 4 × 3
2730 = 1368 × 2 - 3 × 2
Similarly,
(a) = 16 × 6 - 7 × 6 = 96 - 42 = 54
(b) = 54 × 5 - 6 × 5 = 240
(c) = 240 × 4 - 5 × 4 = 940
(d) = 940 × 3 - 4 × 3 = 2808
Hence, 2808 will come in place of (d).
12. (5) The given series is based on the following pattern:
Hence, 1863 will come in place of (e).
13. (2) The given series is based on the following pattern:
Hence, 14514.5 will come in place of (c).
14. (1) The given series is based on the following pattern :
Hence, 284 will come in place of(d).
15. (4) The given series is based on the following pattern:
Hence, 97.5 will come in place of (c).
16. (1) The given series is based on the following pattern :
1 = 13
? = 23 = 8
27 = 33
64 = 43
125 = 53
Hence, 8 will come in place of the question mark.
17. (5) The given series is based on the following pattern :
25 = 5²
16 = 4²
? = 3² = 9
4 = 2² and
1 = 1²
Hence, 9 will come in place of the question mark,
18. (1) The given series Is based on the following pattern:
1 × 2 + 2 × 2 = 6
6 × 4 + 4 × 3 = 36
36 × 6 + 6 × 4 = 240
240 × 8 + 8 × 5 = 1960
1960 × 10 + 10 × 6 = 19660
Hence, 19660 will come in place of the question mark.
19. (1) The given series is based on the following pattern :
Hence, 14 will come in place of the question mark.
20. (2) The given series is based on the following pattern :
2 + 5 = 7
7 + 5 = 12
12 + 7 = 19
19 + 12 = 31
31 + 19 = 50
50 + 31 = 81
Hence, 81 will come in place of the question mark.
4. (3) The series is based on the following pattern:
Obviously, 3.5 Is the wrong number which should be replaced by 3.
5. (2) The series is based on the following pattern:
Obviously, 1.75 is the wrong number which should be replaced by 1.5.
6. (3) The given series is based on the following pattern:
7. (5) The given series is based on the following pattern:
8. (2) The given series is based on the following pattern:
5 × 1 + (1)² = 6
6 × 2 + (2)² = 16
16 × 3 + (3)² = 57
57 × 4 + (4)² = 244
Hence, 16 will come in place of question mark.
9. (1) The given series is based on the following patterns.
Hence, 34 will come in place of the question mark.
10. (4) The given series is based on the following pattern:
5 × 2 + 1 = 11
11 × 2 + 3 = 25
25 × 2 + 5 = 55
55 × 2 + 7 = 117
11. (3) The given series is based on the following pattern:
30 = 12 × 6 - 7 × 6
120 = 30 × 5 - 6 × 5
460 = 120 × 4 - 5 × 4
1368 = 460 × 3 - 4 × 3
2730 = 1368 × 2 - 3 × 2
Similarly,
(a) = 16 × 6 - 7 × 6 = 96 - 42 = 54
(b) = 54 × 5 - 6 × 5 = 240
(c) = 240 × 4 - 5 × 4 = 940
(d) = 940 × 3 - 4 × 3 = 2808
Hence, 2808 will come in place of (d).
12. (5) The given series is based on the following pattern:
13. (2) The given series is based on the following pattern:
14. (1) The given series is based on the following pattern :
15. (4) The given series is based on the following pattern:
16. (1) The given series is based on the following pattern :
1 = 13
? = 23 = 8
27 = 33
64 = 43
125 = 53
Hence, 8 will come in place of the question mark.
17. (5) The given series is based on the following pattern :
25 = 5²
16 = 4²
? = 3² = 9
4 = 2² and
1 = 1²
Hence, 9 will come in place of the question mark,
18. (1) The given series Is based on the following pattern:
1 × 2 + 2 × 2 = 6
6 × 4 + 4 × 3 = 36
36 × 6 + 6 × 4 = 240
240 × 8 + 8 × 5 = 1960
1960 × 10 + 10 × 6 = 19660
Hence, 19660 will come in place of the question mark.
19. (1) The given series is based on the following pattern :
20. (2) The given series is based on the following pattern :
2 + 5 = 7
7 + 5 = 12
12 + 7 = 19
19 + 12 = 31
31 + 19 = 50
50 + 31 = 81
Hence, 81 will come in place of the question mark.