Hard Number Series Questions Solution SBI IBPS Set 11

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.

Toughest Number Series Questions and Answers

Directions (1 – 2) : In the following number series only one number is wrong. Find out the wrong number.
1. 8 27 64 125 218 343
(1) 27
(2) 218
(3) 125
(4) 343
(5) None of these
2. 19 68 102 129 145 154
(1) 154
(2) 129
(3) 145
(4) 102
(5) None of these
Directions (3 – 7): What should come in place of the question mark (?) in the following number series?
 
3. 0 5 18 43 84 145 ?
(1) 220
(2) 240
(3) 260
(4) 280
(5) None of these
4. 10 17 48 165 688 3475 ?
(1) 27584
(2) 25670
(3) 21369
(4) 20892
(5) None of these
5. 1 3 24 360 8640 302400 ?
(1) 14525100
(2) 154152000
(3) 14515200
(4) 15425100
(5) None of these
6. 12 14 32 102 416 2090 ?
(1) 15522
(2) 12552
(3) 13525
(4) 17552
(5) None of these
7. 10 15 15 12.5 9.375 6.5625 ?
(1) 4.375
(2) 3.2375
(3) 4.6275
(4) 3.575
(5) None of these
Directions (8 – 12) : What will come in place of the question mark (?) in each of the following series?
8. 17 52 158 477 ? 4310
(1) 1433
(2) 1432
(3) 1435
(4) 1434
(5) None of these
9. 3 22 ? 673 2696 8093
(1) 133
(2) 155
(3) 156
(4) 134
(5) None of these
10. 6 13 38 ? 532 2675
(1) 129
(2) 123
(3) 172
(4) 164
(5) None of these
11. 286 142 ? 34 16 7
(1) 66
(2) 72
(3) 64
(4) 74
(5) None of these
12. 17 9 ? 16.5 35 90
(1) 5
(2) 15
(3) 10
(4) 20
(5) None of these
Directions (13 – 17): What will come in place of the question mark (?) in each of the following series?
13. 2 8 26 ? 242
(1) 78
(2) 72
(3) 82
(4) 84
(5) None of these
14. 3 4 12 ? 196
(1) 45
(2) 40
(3) 41
(4) 49
(5) None of these
15. 9 17 ? 65 129
(1) 32
(2) 24
(3) 35
(4) 33
(5) None of these
16. 7 13 ? 49 97
(1) 27
(2) 25
(3) 23
(4) 29
(5) None of these
17. 5 3 6 ? 64.75
(1) 15
(2) 15.5
(3) 17.5
(4) 17.25
(5) None of these
Directions (18 – 20) : What will come in place of the question mark (?) in each of the following number series?
18. 16 8 12 30 ?
(1) 75
(2) 105
(3) 95
(4) 115
(5) None of these
19. 5 6 14 45 ?
(1) 138
(2) 154
(3) 118
(4) 184
(5) None of these
20. 7 12 32 105 ?
(1) 428
Number Series Questions Answers IBPS SBI SSC UPSC RRB(2) 214
(3) 218
(4) 416
(5) None of these
Number Series Solutions
1. (2)
23 = 8
33 = 27
43 = 64
53 = 125
63 = 216 ≠ 218
73 = 343
2. (4)
19 + 7² = 19 + 49 = 68
68 + 6² = 68 + 36 = 104 ≠ 102
104 + 5² = 104 + 25 = 129
129 + 4² = 129 + 16 = 145
145 + 3² = 145 + 9 = 154
3. (5)
0 + 5 = 5
5 + 13 = 18
18 + 25 = 43
43 + 41 = 84
84 + 61 = 145
? = 145 + 85 = 230
4. (4)
10 × 1 + 1 × 7 = 10 + 7 = 17
17 × 2 + 2 × 7 = 34 + 14 = 48
48 × 3 + 3 × 7 = 144 + 21 = 165
165 × 4 + 4 × 7 = 660 + 28 = 688
688 × 5 + 5 × 7 = 3440 + 35 = 3475
? = 3475 × 6 + 6 × 7
= 20850 + 42 = 20892
5. (3)
1 × 3 = 3
3 × 8 = 24
24 × 15 = 360
360 × 24 = 8640
8640 × 35 = 302400
? = 302400 × 48
= 14515200
6. (2)
12 × 1 + 2 × 1 = 12 + 2 = 14
14 × 2 + 2 × 2 = 28 + 4 = 32
32 × 3 + 2 × 3 = 96 + 6 = 102
102 × 4 + 2 × 4 = 408 + 8 = 416
416 × 5 + 2 × 5 = 2080 + 10 = 2090
? = 2090 × 6 + 2 × 6
= 12540 + 12 = 12552
7. (1)
10 × 3/2 = 15
15 × 4/4 = 15
15 × 5/6 = 12.5
12.5 × 6/8 = 9.375
9.375 × 7/10 = 6.5625
? = 6.5625 × 8/12 = 4.375
8. (3)
The pattern of the number series is :
17 × 3 + 1 = 51 + 1 = 52
52 × 3 + 2 = 156 + 2 = 158
158 × 3 + 3 = 474 + 3 = 477
477 × 3 + 4 = 1431 + 4 = 1435
9. (4)
The pattern of the number series is :
3 × 7 + 1 = 21 + 1= 22
22 × 6 + 2 = 132 + 2 = 134
134 × 5 + 3 = 670 + 3 = 673
673 × 4 + 4 = 2692 + 4 = 2696
10. (1)
The pattern of the number series is :
6 × 1 + 1 × 7 = 6 + 7 = 13
13 × 2 + 2 × 6 = 26 + 12 = 38
38 × 3 + 3 × 5 = 114 + 15 = 129
129 × 4 + 4 × 4 = 516 + 16 = 532
11. (5)
The pattern of the number series is :
286/2 – 1 = 143 – 1 = 142
142/2 – l = 71 – l = 70
70/2 – 1 = 35 – 1 = 34
34/2 – 1 = 17- 1 = 16
12. (3)
The pattern of the number series is :
17 × 0.5 + 0.5 = 9
9 × 1 + 1 = 10
10 × 1.5 + 1.5 = 16.5
16.5 × 2 + 2 = 35
13. (5)
The pattern is :
2 × 3 + 2 = 6 + 2 = 8
8 × 3 + 2 = 24 + 2 = 26
26 × 3 + 2 = 78 + 2 = 80
80 × 3 + 2 = 240 + 2 = 242
14. (1)
The pattern is :
3 × 1 + 1² = 3 + 1 = 4
4 × 2 + 2² = 8 + 4= 12
12 × 3 + 3² = 36 + 9 = 45
45 × 4 + 4² = 180 + 16 = 196
15. (4)
The pattern is :
9 × 2 – 1 = 18 – 1 = 17
17 × 2 – 1 = 34 – 1 = 33
33 × 2 – 1 = 66 – 1 = 65
65 × 2 – 1 = 130 – 1 = 129
16. (2)
The pattern is :
7 × 2 – 1 = 14 – 1 = 13
13 × 2 – 1 = 26 – 1 = 25
25 × 2 – 1 = 50 – 1 = 49
49 × 2 – 1 = 98 – 1 = 97
17. (3) The pattern is :
5 × 0.5 + 0.5 = 2.5 + 0.5 = 3
3 × 1.5 + 1.5 = 4.5 + 1.5 = 6
6 × 2.5 + 2.5 = 15 + 2.5 = 17.5
17.5 × 3.5 + 3.5 = 61.25 + 3.5 = 64.75
18. (2) The pattern is :
16 × 0.5 = 8
8 × 1.5 = 12
12 × 2.5 = 30
30 × 3.5 = 105
19. (4) The pattern is :
5 × 1 + 1 = 6
6 × 2 + 2 = 14
14 × 3 + 3 = 45
45 × 4 + 4 = 184
20. (1) The pattern is :
7 ×1 + 1 × 5 = 12
12 × 2 + 2 × 4 = 32
32 × 3 + 3 × 3 = 105
105 × 4 + 4 × 2 = 428