Direction: In the following number series only one number is wrong. Find out the wrong number.

**A. ** 215

**B. ** 63

**C. ** 7

**D. ** 28

**E. ** None of these

**Answer : ****Option D**

**Explaination / Solution: **

0, 7, 28, 63, 124, 215

The pattern is = 1^{3} - 1, 23 - 1, 33 - 1, 43 - 1, 53 - 1, 63 - 1

So the wrong term 28 is replace by = 33 - 1 = 27

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

**A. ** 1118

**B. ** 979

**C. ** 1103

**D. ** 1120

**E. ** None of these

**Answer : ****Option C**

**Explaination / Solution: **

32, 49, 83, 151, 287, 559, ?

32 + 1*17 = 32 + 17 = 49;

49 + 2*17 = 49 + 34 = 83

83 + 4*17 = 83 + 68 = 151;

151 + 8*17 = 151 + 136 = 287

287 + 16*17 = 287 + 272 = 559;

559 + 32*17 = 559 + 544 = 1103

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

**A. ** 4.3008

**B. ** 6.5038

**C. ** 4.4015

**D. ** 5.6002

**E. ** None of these

**Answer : ****Option A**

**Explaination / Solution: **

1050, 420, 168, 67.2, 26.88, 10.752 ?

1050 *2/5 = 420;

420 *2/5 = 168

168 *2/5 = 67.2

67.2 *2/5 = 26.88

26.88 *2/5 = 10.752

10.752 *2/5 = 4.3008

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

**A. ** 11.6

**B. ** 12.2

**C. ** 10.4

**D. ** 9.8

**E. ** None of these

**Answer : ****Option A**

**Explaination / Solution: **

45030 9000 1795 355 68 ?

(45030/5) - 6 = 9000

(9000/5) - 5 = 1795

(1795/5) - 4 = 355

(355/5) - 3 = 68

(68/5) - 2 = 11.6

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Direction: What should come in place of the question mark (?) in the following number series?

**A. ** 246

**B. ** 236

**C. ** 217

**D. ** 237

**E. ** None of these

**Answer : ****Option D**

**Explaination / Solution: **

17 21 37 73 137 (?)

The pattern of the Sequence & Series is:

17 + 2^{2} = 17 + 4 = 21

21 + 4^{2} = 21 +16 = 37

37 + 6^{2} = 37 + 36 = 73

73 + 8^{2} = 73 + 64 = 137

137 + 10^{2} = 137 + 100 = 237

So, ? = 137 + 10^{2} = 137 + 100 = 237

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

**A. ** 112

**B. ** 132

**C. ** 111

**D. ** 122

**E. ** None of these

**Answer : ****Option D**

**Explaination / Solution: **

17, 22, 32, 47, 67, 92, ?

The given series is

+ (5 × 1),

+ (5 × 2),

+ (5 × 3),

+ (5 × 4),

+ (5 × 5),

+ (5 × 6)

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

**A. ** 70

**B. ** 90

**C. ** 80

**D. ** 110

**E. ** None of these

**Answer : ****Option C**

**Explaination / Solution: **

The given series is – (11 × 1), – (11 × 2) – (11 × 3), - (11 × 4), – (11 × 5), – (11 × 6)

311 300 278 245 201 146 ?

The given series is – (11 × 1), – (11 × 2) – (11 × 3), - (11 × 4), – (11 × 5), – (11 × 6)

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

**A. ** 117

**B. ** 347

**C. ** 258

**D. ** 174

**E. ** None of these

**Answer : ****Option E**

**Explaination / Solution: **

4, 9, 29, ?, 599, 3599

9 = 4×2+1= 8+1

29 = 9×3+2 = 27+2

? = 29×4 + 3 = 116+3 = 119

599 = 119×5 + 4 = 595+4

3599 = 599×6+5 = 3594+ 5

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

**A. ** 132

**B. ** 106

**C. ** 129

**D. ** 127

**E. ** None of these

**Answer : ****Option C**

**Explaination / Solution: **

177 170 159 146 ? 110

The numbers given here have difference of prime numbers in accending order starting from 7.

177 – 170 = 7

170 – 159 = 11

159 – 146 = 13

Hence next number become

146 – 17 = 129

129 – 110 = 19

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Direction: In the following number series only one number is wrong. Find out the wrong number.

**A. ** 161

**B. ** 6

**C. ** 12

**D. ** 5

**E. ** None of these

**Answer : ****Option C**

**Explaination / Solution: **

5, 6, 12, 40, 161, 806

The pattern is 5*1 + 1 = 6, 6*2 + 1 = 13, 13*3 + 1 = 40, 40*4 + 1 = 161, 161*5 + 1 = 806

So the wrong term 12 is replace by = 6*2 + 1 = 13

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