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__Number Series Questions__

__Number Series Questions__

Nowadays, almost in all competitive exams series reasoning questions are 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 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. 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.

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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. 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.

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__Number Series Test__

__Number Series Test__

**Directions (1 - 17) : What should come in place of the question mark (?) in the following number series ?**

**1. 15 12 17 10 ? 8 21 6**

(1) 3

(2) 7

(3) 21

(4) 19

(5) None of these

**2. 4 6 12 30 90 315 ?**

(1) 945

(2) 1102

(3) 1260

(4) 1417.5

(5) None of these

**3. 1548 516 129 43 ?**

(1) 11

(2) 10.75

(3) 9.5

(4) 12

(5) None of these

**4. 949 189.8 ? 22.776 11.388 6.8328**

(1) 48.24

(2) 53.86

(3) 74.26

(4) 56.94

(5) None of these

**5. 121 144 190 259 ? 466**

(1) 351

(2) 349

(3) 374

(4) 328

(5) None of these

**6. 14 43.5 264 ? 76188**

(1) 3168

(2) 3176

(3) 1587

(4) 1590

(5) None of these

**7. 41 164 2624 ? 6045696**

(1) 104244

(2) 94644

(3) 94464

(4) 102444

(5) None of these

**8. 12 12 18 45 180 1170 ?**

(1) 12285

(2) 10530

(3) 11700

(4) 12870

(5) 7605

**9. 444 467 513 582 674 789 ?**

(1) 950

(2) 904

(3) 927

(4) 881

(5) 973

**10. 1 16 81 256 625 1296 ?**

(1) 4096

(2) 2401

(3) 1764

(4) 3136

(5) 6561

**11. 23 25 53 163 657 3291 ?**

(1) 16461

(2) 13169

(3) 9877

(4) 23045

(5) 19753

**12. 13 13 65 585 7605 129285 ?**

(1) 2456415

(2) 2235675

(3) 2980565

(4) 2714985

(5) 2197845

**13. 40280625 732375 16275 465 18.6 1.24 ?**

(1) 0.248

(2) 0.336

(3) 0.424

(4) 0.512

(5) 0.639

**14. 14 12 21 59 231 1149 ?**

(1) 6987

(2) 6787

(3) 6887

(4) 6687

(5) 6587

**15. 1728 2744 4096 5832 8000 10648 ?**

(1) 12167

(2) 13824

(3) 15625

(4) 9261

(5) 17576

**16. 120 15 105 17.5 87.5 ?**

(1) 18.5

(2) 19.5

(3) 21.875

(4) 17.5

(5) 90

**17. 3 6 21 28 55 66 ? 120**

(1) 103

(2) 104

(3) 108

(4) 106

(5) 105

**Directions (18 - 20) : In each of the following questions a number series is given which has only one wrong number. You have to find out the wrong number.**

**18. 7.25 47.5 87.5 157.5 247.5 357.5 487.5**

(1) 357.5

(2) 87.5

(3) 157.5

(4) 7.5

(5) 47.5

**19. 13 16 21 27 39 52 69**

(2) 39

(3) 27

(4) 52

(5) 16

**20. 1500 1581 1664 1749 1833 1925 2016**

(1) 1581

(2) 1664

(3) 1833

(4) 1925

(5) 1749

__What Others Are Reading__

**Number Series Solutions**

Hence, 19 will come in place of the question mark.

Hence, 1260 will come in place of the question mark.

Hence, 10.75 will replace the question mark.

Hence, 56.94 will replace the question mark.

5. (1) The given number series is based on the following pattern :

121 + 23 × 1 = 144

144 + 23 × 2 = 190

190 + 23 × 3 = 259

? = 259 + 23 × 4

= 259 + 92 = 351

Hence, 351 will replace the question mark.

6. (5) The given number series is based on the following pattern :

14 × 3 + 1.5 = 43.5

43.5 × 6 + 1.5 × 2 = 264

264 × 12 + 1.5 × 4= 3174

3174 × 24 + 1.5 × 8 = 76188

Hence, 3174 will replace the question mark.

7. (3) The given number series is based on the following pattern :

41 × 2² = 164

164 × 4² = 2624

2624 × 6² = 94464

94464 × 8² = 6045696

Hence, 94464 will replace the question mark.

8. (1) The given number series is based on the following pattern :

12 × 1 = 12

12 × 1.5 = 18

18 × (1 + 1.5) = 18 × 2.5 = 45

45 × (1.5 + 2.5) = 45 × 4 = 180

180 × (4 + 2.5) = 180 × 6.5 = 1170

? = 1170 × (4 + 6.5) = 12285

Hence, 12285 will replace the question mark.

9. (3) The given number series is based on the following pattern :

467 - 444 = 23 = 23 × 1

513 - 467 = 46 = 23 × 2

582 - 513 = 69 = 23 × 3

674 - 582 = 92 = 23 × 4

789 - 674 = 115 = 23 × 5

? = 789 + 23 × 6 = 789 + 138 = 927

Hence, 927 will replace the question mark.

10. (2) The given number series is based on the following pattern :

1 = l

^{4};
16 = 2

^{4};
81 = 3

^{4};
256 = 4

^{4};
625 = 5

^{4};
1296 = 6

^{4};
? = 7

^{4}= 7 × 7 × 7 × 7 = 2401
Hence, 2401 will replace the question mark.

11. (5) The given number series is based on the following pattern :

23 × 1 + 2 = 25

25 × 2 + 3 = 53

53 × 3 + 4 = 163

163 × 4 + 5 = 657

657 × 5 + 6 = 3291

? = 3291 × 6 + 7 = 19746 + 7 = 19753

Hence, 19753 will replace the question mark.

12. (4) The given number series is based on the following pattern :

13 × 1 = 13

13 × 5 = 65

65 × 9 = 585

585 × 13 = 7605

7605 × 17 = 129285

? = 129285 × 21 = 2714985

Hence, 2714985 will replace the question mark.

13. (1) The given number series is based on the following pattern :

40280625 ÷ 55 = 732375

732375 ÷ 45 = 16275

16275 ÷ 35 = 465

465 ÷ 25 = 18.6

18.6 ÷ 15 = 1.24

? = 1.24 ÷ 5 = 0.248

Hence, 0.248 will replace the question mark.

14. (3) The given number series is based on the following pattern :

14 × 1 - 2 = 14 - 2 = 12

12 × 2 - 3 = 24 - 3 = 21

21 × 3 - 4 = 63 - 4 = 59

59 × 4 - 5 = 236 - 5 = 231

231 × 5 - 6 = 1155 - 6 = 1149

? = 1149 × 6 - 7 = 6894 - 7 = 6887

? = 1149 × 6 - 7 = 6894 - 7 = 6887

Hence, 6887 will replace the question mark.

15. (2) The given number series is based on the following pattern :

12 × 12 × 12 = 1728

14 × 14 × 14 = 2744

16 × 16 × 16 = 4096

18 × 18 × 18 = 5832

20 × 20 × 20 = 8000

22 × 22 × 22 = 10648

? = 24 × 24 × 24 = 13824

Hence, 13824 will replace the question mark.

16. (3) The given number series is based on the following pattern :

120 ÷ 8 = 7

15 × 7 = 105

105 ÷ 6 = 17.5

17.5 × 5 = 87.5

= 87.5 ÷ 4 = 21.875

= 87.5 ÷ 4 = 21.875

Hence, 21.875 will replace the question mark.

Hence, 105 will replace the question mark.

18. (5) The given number series is based on the following pattern :

487.5 - 357.5 = 130

357.5 - 247.5 = 110

247.5 - 157.5 = 90

157.5 - 87.5 = 70

87.5 - 47.5 = 40

87.5 - 37.5 = 50

37.5 - 7.5 = 30

Clearly, 47.5 is the wrong number. It should be replaced by 37.5.

19. (3) The given number series is based on the following pattern :

13 + 3 = 16

16 + 5 = 21

21 + 7 = 28 ≠ 27

28 + 11 = 39

39 + 13 = 52

52 + 17 = 69

Clearly, 27 is the wrong number. It should be replaced by 28.

20. (3) The given number series is based on the following pattern :

1500 + 81 = 1581

1581 + 83 = 1664

1664 + 85 = 1749

1749 + 87 = 1836 ≠ 1833

1836 + 89 = 1925

1925 + 91 = 2016

Clearly, 1833 is the wrong number. It should be replaced by 1836.