# Reasoning Number Series MCQ set-4

Q 1. **Find out the wrong term: 1, 2, 4, 8, 16, 32, 64, 96, **

A) 4

B) 32

C) 64

D) 96

Answer:** Option D**

Solution: Each term of the series is obtained by multiplying the preceding term by 2.So, 96 is wrong and must be replaced by (64 � 2) i.e., 128.

Q 2.

**Find out the wrong term: 125, 126, 124, 127, 127, 123, 129**

A) 126

B) 124

C) 123

D) 129

Answer:** Option D**

Solution: The correct pattern is + 1, – 2, + 3, – 4, + 5.So, 129 is wrong and must be replaced by (123 + 5) i.e., 128

Q 3.

**Find out the wrong term: 15, 16, 22, 29, 45, 70**

A) 16

B) 22

C) 45

D) 70

Answer:** Option B**

Solution: The correct pattern is + 1, + 4, + 9, + 16, + 25 i.e., + 12 , + 22 , + 32 , + 42 , + 52.So, 22 is wrong and must be replaced by (16 + 4) i.e., 20.

Q 4.

**Find out the wrong term: 105, 85, 60, 30, 0, – 45, – 90**

A) 105

B) 60

C) 0

D) – 45

Answer:** Option C**

Solution: The correct pattern is – 20, – 25, – 30, …………So, 0 is wrong and must be replaced by (30 – 35) i.e., – 5.

Q 5.

**Find out the wrong term: 56, 58, 62, 70, 84, 118, 182**

A) 58

B) 62

C) 84

D) 118

Answer:** Option C**

Solution: The correct pattern is + 2, + 4, + 8, + 16, + 32, + 64 i,e., + 2, + 22 , + 23 , + 24 , + 25 , + 26.So, 84 is wrong and must be replaced by (70 + 16) i.e., 86.

Q 6.

**Find out the wrong term: 325, 259, 202, 160, 127, 105, 94**

A) 94

B) 127

C) 202

D) 259

Answer:** Option C**

Solution: The correct pattern is – 66, – 55, – 44, – 33, – 22, – 11.So, 202 is wrong and must be replaced by (259 – 55) i.e., 204.

Q 7.

**Find out the wrong term: 3, 4, 10, 32, 136, 685, 4116**

A) 10

B) 32

C) 136

D) 4116

Answer:** Option B**

Solution: The correct pattern is � 1 + 1, � 2 + 2, � 3 + 3, � 4 + 4, ……….So, 32 is wrong and must be replaced by (10 � 3 + 3) i.e., 33.

Q 8.

**Find out the wrong term: 380, 188, 92, 48, 20, 8, 2**

A) 8

B) 20

C) 48

D) 188

Answer:** Option C**

Solution: The correct pattern is – 192, – 96, – 48, – 24, – 12, – 6.So, 48 is wrong and must be replaced by (92 – 48) i.e., 44.

Q 9.

**Find out the wrong term: 2, 6, 24, 96, 285, 568, 567**

A) 6

B) 24

C) 285

D) 567

Answer:** Option B**

Solution: The correct pattern is � 6 + 6, � 5 + 5, � 4 + 4, � 3 + 3, …………So, 24 is wrong and must be replaced by (6 � 5 – 5) i.e., 25.

Q 10.

**Find out the wrong term: 89, 78, 86, 80, 85, 82, 83**

A) 83

B) 82

C) 86

D) 78

Answer:** Option C**

Solution: The correct pattern is – 11, + 9, – 7, + 5, – 3 + 1.So, 86 is wrong and must be replaced by (78 + 9) i.e., 87.

Q 11.

**Find out the wrong term: 1, 5, 9, 15, 25, 37, 49**

A) 9

B) 15

C) 25

D) 37

Answer:** Option B**

Solution: The terms of the given series are 12 , (22 + 1), 32 , (42 + 1), 52 , (62 + 1), 72 So, 15 is wrong and must be replaced by (42 + 1) i.e., 17.

Q 12.

**Find out the wrong term: 445, 221, 109, 46, 25, 11, 4**

A) 25

B) 46

C) 109

D) 221

Answer:** Option B**

Solution: 3 is subtracted from each number and the result divided by 2 to obtain the next number of the series,So, 46 is wrong and must be replaced by (109 – 3/2) i.e., 53.

Q 13.

**Find out the wrong term: 11, 5, 20, 12, 40, 26, 74, 54**

A) 5

B) 20

C) 40

D) 26

Answer:** Option C**

Solution: The given sequence is a combination of two series:I: 11, 20, 40, 74 and II: 5, 12, 26, 54The correct pattern in I: is + 9, + 18, + 36,…..So, 40 is wrong and must be replaced by (20 + 18) i.e., 38.

Q 14.

**Find out the wrong term: 93, 309, 434, 498, 521, 533**

A) 309

B) 434

C) 498

D) 521

Answer:** Option D**

Solution: The correct pattern is + 63 , + 53 , + 43 , + 33 , …………

So, 521 is wrong and must be replaced by (498 + 33 ) i.e., 525.

Q 15.

**Find out the wrong term: 1, 5, 5, 9, 7, 11, 11, 15, 12, 17**

A) 11

B) 12

C) 17

D) 15

Answer:** Option B**

Solution: The given sequence is a combination of two series :I: 1, 5, 7, 11, 12 and II: 5, 9, 11, 15, 17The pattern in both I and II is + 4, + 2, + 4, + 2,

So, 12 is wrong and must be replaced by (11 + 2) i.e., 13.

Q 16.

**Find out the wrong term: 1, 3, 12, 25, 48**

A) 3

B) 12

C) 25

D) 48

Answer:** Option C**

Solution: The terms of the series are (12 – 0), (22 – 12 ), (42 – 22 ), (62 – 32 ), and (82 – 42 ), So, 25 is wrong and must be replaced by (62 – 32) i.e., 27.

Q 17.

**Find out the wrong term: 2, 3, 4, 4, 6, 8, 9, 12, 16**

A) 3

B) 6

C) 9

D) 12

Answer:** Option C**

Solution: The given sequence is a combination of three series:I: 1st, 4th, 7th terms i.e., 2, 4, 9…..II: 2nd, 5th, 8th terms i.e.,3, 6, 12…….III: 3rd, 6th, 9th terms i.e., 4, 8, 16………………In each one of I, II and III, each term is twice the preceding term.So, 9 is wrong and must be replaced by (4 � 2) i.e., 8.

Q 18.

**Find out the wrong term: 3, 2, 8, 9, 13, 22, 18, 32, 23, 42**

A) 8

B) 9

C) 13

D) 22

Answer:** Option B**

Solution: The given sequence is a combination of two series:I: 3, 8, 13, 18, 23 andII: 2, 9, 22, 32, 42The pattern in I: is + 5, and the pattern in II: is + 10

So, in II, 9 is wrong and must be replaced by (2 + 10) i.e., 12.

Q 19.

**Find out the wrong term: 1236, 2346, 3456, 4566, 5686**

A) 1236

B) 3456

C) 4566

D) 5686

Answer:** Option D**

Solution: The correct pattern in the series is + 1110.

So, 5686 is wrong and must be replaced by (4566 + 1110) i.e., 5676.

Q 20.

**In a given series one term is wrong or missing term: 1, 5, 14, 30, 55. 93**

A) 97

B) 95

C) 93

D) 55

Answer:** Option C**

Solution: The correct pattern is + 4, + 9, + 16, + 25,+ 36 i.e., + 22, + 32 , + 42 , + 52 , + 62 So, 93 is wrong and must be replaced by (55 + 36) i.e., 91.

Q 21.

**In a given series one term is wrong or missing term: 1, 2, 5, 10, 17, 28**

A) 30

B) 28

C) 27

D) 17

Answer:** Option B**

Solution: The correct sequence is + 1, + 3, + 5, + 7, + 9.So, 28 is wrong and must be replaced by (17 + 9) i.e., 26.

Q 22.

**In a given series one term is wrong or missing term: 0, 3, 8, 15, 24, 33**

A) 8

B) 15

C) 26

D) 33

Answer:** Option D**

Solution: The correct pattern is + 3, + 5, + 7, + 9, + 11.So, 33 is wrong and must be replaced by (24 + 11) i.e., 35.

Q 23.

**In a given series one term is wrong or missing term: 2, 3, 5, 8, 13, 34**

A) 21

B) 25

C) 29

D) 34

Answer:** Option A**

Solution: Clearly, each term of the series is the sum of the preceding two terms.Now, 8 + 13 = 21 and 13 + 21 = 34.So, the term 21 is missing.

Q 24.

**In a given series one term is wrong or missing term: 1, 5, 11, 19, 29, 55**

A) 55

B) 41

C) 29

D) 19

Answer:** Option B**Q 25. **Find the missing term : 4, 6, 10, 16, 24, ?**

A) 40

B) 34

C) 30

D) 28

[show_answer]Answer:** Option B**

Solution: 1st term : 4 2nd term : 4 + 2 = 6

3rd term : 6 + 4 = 10

4th term : 10 + 6 = 16

5th term : 16 + 8 = 24

So,

6th term : 24 + 10 = 34

Q 26.

**Find the missing term: 36, 34, 30, 28, 24, ?**

A) 20

B) 23

C) 22

D) 26

Answer:** Option C**

Solution: According to the given question:

Q 27.

**Find the missing term : 3, 5, 9, 17, ?**

A) 33

B) 42

C) 26

D) 65

Answer:** Option A**

Solution: + 2 5 + 4 9 + 8 17 + 16 33

1st term : 3

2nd term : 3 + 2 = 5

3rd term : 5 + 4 = 9

4th term : 9 + 8 = 17

So,

5th term : 17 + 16 = 33

Q 28.

**Find the missing term :9*2 : 9*9 : : 9*5 : ?**

A) 9*4

B) 9*6

C) 9*7

D) 9*8

Answer:** Option B**

Solution: 9 � 2 : 9 � 9 : : 9 � 5 : ?18 : 81 : : 45 : 9 � 6 So. 9 � 6 will come in place of question mark.

Q 29.

**Find the missing term : 1, 0, 3, 2, 5, 6, ?, 12, 9, 20**

A) 9

B) 10

C) 7

D) 8

Answer:** Option C**

Solution: There are two series in the given question.

1st series: 1, 3, 5, 7, 9 … ( each next term are generated by adding 2)

2nd series: 0, 2, 6, 12, 20 … ( each next term are generated by adding 2n [where n=1,2,3,4…])

Q 30.

**Find the missing term : 5, 16, 51, 158, ?**

A) 1452

B) 483

C) 481

D) 1454

Answer:** Option C**

Solution: The series is as follows:5 � 3 + 1 = 1616 � 3 + 3 = 5151 � 3 + 5 = 158158 � 3 + 7= 481

Q 31.

**Find the missing term : 3, 5, 35, 10, 12, 35, _ , _**

A) 19 , 35

B) 17, 19

C) 19, 24

D) 22, 35

Answer:** Option B**

Solution: Every 3rd multiple of the given series is constant and the rest of the series is as follow as showing in below image

Q 32.

**Find the missing term : 7, 8, 18, 57, ?, 1165**

A) 174

B) 232

C) 224

D) 228

Answer:** Option B**

Solution: 7 � 1 + 1 = 88 � 2 + 2 = 1818 � 3 + 3 = 5757 � 4 + 4 = 232232 � 5 + 5 = 1165