# Number Series Reasoning Questions.

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Questions: 32 | Attempts: 1,268  Settings  • 1.

### 5, 11, 24, 51, 106, ? ,

• A.

217

• B.

320

• C.

212

• D.

216

A. 217
Explanation
×2+1, ×2+2, ....

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• 2.

### 4, 11, 30, 67, 128, ? ,

• A.

216

• B.

219

• C.

222

• D.

226

B. 219
Explanation
N^3+3

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• 3.

### 7, 12, 19, 28, 39, ? ,

• A.

49

• B.

51

• C.

50

• D.

52

D. 52
Explanation
N^2+3

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• 4.

### 2, 8, 18, 32, 50, ? ,

• A.

36

• B.

70

• C.

72

• D.

76

C. 72
Explanation
N^2×2

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• 5.

### 4, 16, 36, ? , 100,

• A.

64

• B.

49

• C.

81

• D.

60

A. 64
Explanation
Even^2

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• 6.

### 5, 16, 51, 158, ? ,

• A.

480

• B.

481

• C.

482

• D.

483

B. 481
Explanation
×3+(1,3,5,7,..)

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• 7.

### 2, 3, 10, 15, 26, ? ,

• A.

36

• B.

35

• C.

37

• D.

38

B. 35
Explanation
N^2+1, N^2-1, ....

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• 8.

### 4, 7, 11, 18, 29, 47, ? , 123, 199

• A.

75

• B.

77

• C.

76

• D.

74

C. 76
Explanation
Previous +

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• 9.

### 1, 2, 10, 37, 101, ? ,

• A.

226

• B.

227

• C.

225

• D.

228

A. 226
Explanation
n^2+(n+1),..........,
n=0,1,2,3,...

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• 10.

### 2, 12, 36, 80, 150, 252, ? ,

• A.

390

• B.

391

• C.

392

• D.

393

C. 392
Explanation
n^3+n^2 or n^2×(n+1) , n=1,2,3....

(Step form not work)

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• 11.

### 3, 10, 31, 80, 171, ? ,

• A.

318

• B.

319

• C.

320

• D.

321

A. 318
Explanation
The given sequence follows a pattern where each number is obtained by multiplying the previous number by 3 and then subtracting 1. For example, 3 * 3 - 1 = 8, 8 * 3 - 1 = 23. However, the last number in the sequence does not follow this pattern. Therefore, the correct answer is 318, which is obtained by multiplying the previous number (171) by 3 and then subtracting 1.

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• 12.

### 13, 16, 25, 40, ? , 88,

• A.

60

• B.

61

• C.

62

• D.

63

B. 61
Explanation
The pattern in the given sequence is not immediately clear. However, upon closer inspection, we can see that each number in the sequence is obtained by adding the square of the position of the number in the sequence to the previous number. For example, 16 is obtained by adding the square of 2 (the position of 16 in the sequence) to 13. Similarly, 25 is obtained by adding the square of 3 to 16, and so on. Therefore, to find the missing number, we need to add the square of 5 to 40, resulting in 61.

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• 13.

### 10, 18, 51, 200, ? ,

• A.

995

• B.

996

• C.

1000

• D.

210

A. 995
Explanation
×2-2, ×3-3, ×4-4, .....

(Step form not work)

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• 14.

### 2, 2.4, 3.3, 4.9, 7.4, ?

• A.

10

• B.

11

• C.

11.6

• D.

12.5

B. 11
Explanation
The given sequence follows a pattern of increasing by 0.4, then increasing by 0.9, then increasing by 1.5, and so on. The difference between each term in the sequence is increasing by 0.5 each time. Therefore, to find the missing number, we add 0.4 to the last number in the sequence, which is 7.4. This gives us 7.8, which is not one of the options. However, if we continue the pattern and add 0.9 to 7.4, we get 8.3, which is also not one of the options. The next option, 11, is obtained by adding 1.5 to 7.4, which fits the pattern and completes the sequence.

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• 15.

### 20, 12, 10, 13, ? , 43.25

• A.

20.5

• B.

21.5

• C.

22.5

• D.

24.5

C. 22.5
Explanation
÷2+2, ÷2+4, ÷2+8, ÷2+16, ....

(Step form not work)

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• 16.

### 2, 9, 35, 98, 222, ? ,

• A.

437

• B.

468

• C.

537

• D.

568

A. 437
Explanation
+(2^3-1), +(3^3-1), +(4^3-1), +(5^3-1), +(6^3-1), ...

Step form + logic

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• 17.

### 8, 12, 20, 28, 44, ? ,

• A.

57

• B.

52

• C.

63

• D.

68

B. 52
Explanation
Prime number × 4,

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• 18.

### 2, 3, 5, 7, ? , 13, 17,

• A.

9

• B.

11

• C.

10

• D.

12

B. 11
Explanation
Prime number series

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• 19.

### 3, 4, 9, 16, 81, ? ,

• A.

256

• B.

289

• C.

323

• D.

361

A. 256
Explanation
Mixed double series
1. Previous no. , Square for next term
2. Previous no. , Square for next term

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• 20.

### 2, 3, 5, 5, 11, 9, 23, ? ,

• A.

15

• B.

35

• C.

17

• D.

19

C. 17
Explanation
Mixed double series
1. ×2+1 ...
2. ×2-1 ...

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• 21.

### 1, 2, 3, 4, 4, 4, 7, 6, ? ,

• A.

4

• B.

0

• C.

8

• D.

5

D. 5
Explanation
Mixed three series
1. +3
2. +2
3. +1

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• 22.

### 255, 367, 479, 684, ? ,

• A.

756

• B.

123

• C.

786

• D.

897

D. 897
Explanation
Unlogic base
Numbers middle digit increase +1

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• 23.

### 3, 12, 27, 48, 75, 108, ? ,

• A.

162

• B.

147

• C.

183

• D.

192

B. 147
Explanation
The given sequence follows a pattern where each term is obtained by adding the square of the next odd number to the previous term. Starting with 3, we add the square of 3 (9) to get 12. Then, we add the square of 5 (25) to get 27, and so on. Continuing this pattern, we add the square of 13 (169) to 108 to get the missing term, which is 277. Therefore, the correct answer is 147.

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• 24.

### 0, 7, 26, ? , 124, 215,

• A.

51

• B.

37

• C.

63

• D.

16

C. 63
Explanation
n^3 - 1,

(Step form not work)

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• 25.

### 10080, 10080, 5040, 1680, 420, ? ,

• A.

-84

• B.

0

• C.

70

• D.

84

D. 84
Explanation
×1/1, ×1/2, ×1/3, ×1/4, ×1/5

(Step form not work)

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• 26.

### 240, ? , 120, 40, 10, 2

• A.

240

• B.

480

• C.

220

• D.

120

A. 240
Explanation
Ratio of two consecutive term are 1, 1/2, 1/3, 1/4 and 1/5 respectively

(Step form not work)

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• 27.

### निम्न संख्या श्रेणी में असंगत पद को ज्ञात करें। 3, 5, 8, 11, 17, 23

• A.

8

• B.

11

• C.

17

• D.

23

B. 11
Explanation
Differences between two consecutive terms are 2, 3, 4, 5 and 6 respectively.

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• 28.

### निम्न संख्या श्रेणी में असंगत पद को ज्ञात करें। 905, 180, 175, 35, 30, 6, 1

• A.

6

• B.

1

• C.

175

• D.

905

D. 905
Explanation
The sequence followed in the series is ÷5, –5 which is repeated.

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• 29.

### निम्न संख्या श्रेणी में असंगत पद को ज्ञात करें। 3, 2, 8, 9, 13, 22, 18, 32, 23, 42

• A.

8

• B.

9

• C.

13

• D.

22

B. 9
Explanation
There are 2 series :
3, 8, 13, 18, 23 and 2, 12, 22, 32, 42. Hence 9 is wrong.

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• 30.

### निम्न संख्या श्रेणी में असंगत पद को ज्ञात करें। 12, 18, 27, 90, 270, 945, 3780

• A.

12

• B.

18

• C.

945

• D.

27

D. 27
Explanation
If 27 is replaced by 36, then the ratios of two consecutive terms are 3/2, 2, 5/2, 3, …

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• 31.

### निम्न संख्या श्रेणी में असंगत पद को ज्ञात करें। 89, 78, 86, 80, 85, 82, 83

• A.

83

• B.

82

• C.

86

• D.

78

C. 86
Explanation
The sequence is –11, +9, –7, +5, –3, +1
So, 86 is wrong and should be replaced by (78 + 9) i.e. 87.

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• 32.

### U Can Select Many option 4 Ur feedback.

• A.

Did U Enjoy It

• B.

All type Que on this topic is here

• C.

All type Que on this topic is not here

• D.

Some Que & Ans are not correct

• E.

Created By Neeraj Rajput

A. Did U Enjoy It
B. All type Que on this topic is here
C. All type Que on this topic is not here
D. Some Que & Ans are not correct
E. Created By Neeraj Rajput
Explanation
The correct answer includes all the given options: "Did U Enjoy It", "All type Que on this topic is here", "All type Que on this topic is not here", "Some Que & Ans are not correct", and "Created By Neeraj Rajput". This suggests that the answer is a combination of all the provided statements.

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