Number Series Questions For IBPS Pre Mains Set 13

Advanced 467 Reasoning Puzzles Book SBI PO 2018

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.

Number Series Questions and Answers

Directions (1 - 4) : In each question below, a number series is given in which one number is wrong. Find out the wrong number.

1. 3 5 13 43 176 891 5352
(1) 5 
(2) 13
(3) 43 
(4) 176
(5) 891

2. 6 7 16 41 90 154 292
(1) 7 
(2) 16
(3) 41 
(4) 90
(5) 154

3. 5 7 16 57 244 1245 7506
(1) 7 
(2) 16
(3) 57 
(4) 244
(5) 1245

4. 4 2.5 3.5 6.5 15.5 41.25 126.75
(1) 2.5 
(2) 3.5
(3) 6.5 
(4) 15.5
(5) 41.25

Directions (5 - 9) : What should come in place of the question mark (?) in the following number series.

5. 325 314 292 259 215 ?
(1) 126 
(2) 116
(3) 130 
(4) 160
(5) None of these

6. 45 46 70 141 ? 1061.5
(1) 353 
(2) 353.5
(3) 352.5 
(4) 352
(5) None of these

7. 620 632 608 644 596 ?
(1) 536 
(2) 556
(3) 656 
(4) 646
(5) None of these

8. 15 25 40 65 ? 195
(1) 115 
(2) 90
(3) 105 
(4) 120
(5) None of these

9. 120 320 ? 2070 5195 13007.5
(1) 800 
(2) 920
(3) 850 
(4) 900
(5) None of these

Directions (10 - 14): In the following number series only one number is wrong. Find out the wrong number.

10. 32 34 37 46 62 87 123
(1) 34 
(2) 37
(3) 62 
(4) 87
(5) 46

11. 7 18 40 106 183 282 403
(1) 18 
(2) 282
(3) 40 
(4) 106
(5) 183

12. 850 843 829 808 788 745 703
(1) 843 
(2) 829
(3) 808 
(4) 788
(5) 745

13. 33 321 465 537 573 590 600
(1) 321 
(2) 465
(3) 573 
(4) 537
(5) 590

14. 37 47 52 67 87 112 142
(1) 47 
(2) 52
(3) 67 
(4) 87
(5) 112

Directions (15 - 19) : What will come in place of the question mark (?) in the following number series ?

15. 13 16 22 33 51 (?)
(1) 89 
(2) 78
(3) 102 
(4) 69
(5) None of these

16. 39 52 78 117 169 (?)
(1) 246 
(2) 182
(3) 234 
(4) 256
(5) None of these

17. 62 87 187 412 812 (?)
(1) 1012 
(2) 1437
(3) 1337 
(4) 1457
(5) None of these

18. 7 8 24 105 361 (?)
(1) 986 
(2) 617
(3) 486 
(4) 1657
(5) None of these

19. 656 432 320 264 236 (?)
(1) 222 
(2) 229
(3) 232 
(4) 223
(5) None of these

Directions (20): What will come in place of the question mark (?) in the following number series ?

20. 7 20 46 98 202 (?)
(1) 420 
(2) 410
Number Series Questions For IBPS Pre Mains(3) 310 
(4) 320
(5) None of these

Number Series For Bank PO Solutions

1. 2; The series is ×3 + 8, ×3 + 16, ×3 + 24...

2. 4; The series is 69² + 69, 67² + 67, 65² + 65, 63² + 63...

3. 5; The series is -23 + 1, -33 + 2, -43 + 3, -53 + 4...

4. 1; The number should be 5555 in place of 5531. 
-7², -9², -11², -13², -15², -17² ...

5. 2; The number should be 21 in place of 426.
+1, +2, +4, +8, +16, +32

6. 4; The number should be 770 in place of 760.
×1 + 2, ×2 + 4, ×3 + 6, ×4 + 8, ×5 + 10, ×6+ 12, ...

7. 4; The series is 0² + 4, 1² + 2, 3² + 0, 6² -2, 10² - 4, 15² - 6, 21² - 8 ...
Hence, 435 should be replaced with 433

8. 1; The number should be 2 in place of 1 ÷ 3.5, ÷3, ÷2.5, ÷2, ÷1.5, ÷1, ...

9. 2; The series is ×2 - 4, ×4 - 8, ×6 - 12, ×8 - 16, ×10 - 20...

10. 1; The series is ×3 + 1, ×7 + 2, ×11 + 3, ×15 + 4...

11. 4; The series is ×10 - 3, ×9 - 6, ×8 - 9, ×7- 12, ×6 - 15...

12. 3; The series is ×8 + 13, ×7 + 26, ×6 + 39, ×5 + 52, ×4 + 65

13. 1; The series is +93, +83, +73, +63, +53...

14. 1; The series is 2 × 9² - 1, 2 × 10² - 1, 2 × 11² -1, 2 × 12² -1, 2 × 13² - 1, 2 × 14² - 1,

15. 4; The series is 141, +(14)3, +(12)3, +(10)3...

16. 3; The series is ×2.5, +4, ×2.5, +4...

17. 2; 15 × 2.9 = 43.5
15 × 3.8 = 57
15 × 4.7 = 70.5
15 × 5.6 = 84
15 × 6.5 = 97.5
15 × 7.4 = 111

18. 4;

19. 2; The series is 89² + 1, 88² + 2, 87² + 3,..

20. 4; The series is 7 + 7² - 2, 8 + 8² - 4, 9 + 9² - 6, 10 +10² - 8...