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**Numbers Series (Quant):**

**Question 1:** The following numbers form a series. Find the odd one out.

4, 3, 4, 9, 13, 155

a) 3

b) 4

c) 13

d) 155

e) 9

**Answer**: c

**Solution**:

4 × 1 – 1 = 3

3 × 2 – 2 = 4

4 × 3 – 3 = 9

**9 × 4 – 4 = 32**

32 × 5 – 5 = 155

So, 32 will come in the place of 13.

Hence, option c.

**Question 2:** The following numbers form a series. Find the odd one out.

34, 36, 26, 51, 2, 83

a) 51

b) 36

c) 2

d) 83

e) 26

**Answer**: b

**Solution:**

**34 + 1**^{2}** = 35**

35 – 3^{2} = 26

26 + 5^{2} = 51

51 – 7^{2} = 2

2 + 9^{2} = 83

So, 35 will come in the place of 36.

Hence, option b.

**Question 3: **The following numbers form a series. Find the odd one out.

945, 210, 60, 24, 16, 8

a) 210

b) 16

c) 60

d) 8

e) 24

**Answer**: d

**Solution: **

945/ 4.5 = 210

210/ 3.5 = 60

60/2.5 = 24

24/1.5 = 16

**16/0.5 = 32**

So, 32 will come in the place of 8.

Hence, option d.

**Question 4: **The following numbers form a series. Find the odd one out.

54, 70, 58, 77, 62, 81

a) 70

b) 77

c) 58

d) 54

e) 62

**Answer**: a

**Solution:**

**54 + 19 = 73**

73 – 15 = 58

58 + 19 = 77

77 – 15 = 62

62 + 19 = 81

So, 73 will come in the place of 70.

Hence, option a.

**Question 5: **The following numbers form a series. Find the odd one out.

32, 38, 49, 67, 90, 132

a) 67

b) 90

c) 32

d) 38

e) 49

**Answer**: b

**Solution**:

32 + 6 = 38

38 + 11 = 49

49 + 18 = 67

**67 + 27 = 94**

94 + 38 = 132

So, 94 will come in the place of 90.

Hence, option b.

**Question 6: **What will come in place of the question mark (?) in the following series?

24, 94, 157, 213, ? 304

a) 284

b) 262

c) 296

d) 246

e) 256

**Answer**: b

**Solution**:

24 + 70 = 94

94 + 63 = 157

157 + 56 = 213

213 + 49 = 262

262 + 42 = 304

Hence, option b.

**Question 7: **What will come in place of the question mark (?) in the following series?

14, 15.2, 16.8, 19.2, 22.8, ?

a) 28

b) 27.6

c) 28.8

d) 27.2

e) 29.6

**Answer**: a

**Solution:**

Hence, option a.

**Question 8: **What will come in place of the question mark (?) in the following series?

16, ?, 48, 240, 1680, 15120

a) 20

b) 36

c) 20

d) 24

e) None of these

**Answer**: e)

**Solution**:

16 × 1 = **16**

16 × 3 = 48

48 × 5 = 240

240 × 7 = 1680

1680 × 9 = 15120

Hence, option e.

**Question 9: **What will come in place of the question mark (?) in the following series?

78, 59, 42, ?, 18, 11

a) 24

b) 26

c) 32

d) 29

e) 35

**Answer**: d

**Solution**:

78 – 19 = 59

59 – 17 = 42

42 – 13 = 29

29 – 11 = 18

18 – 7 = 11

Hence, option d.

**Question 10: **What will come in place of the question mark (?) in the following series?

15, 8, 9, 15, ?, 82.5

a) 20

b) 32

c) 24

d) 27

e) 36

**Answer**: b

**Solution**:

15 × 0.5 + 0.5 = 8

8 × 1 + 1 = 9

9 + 1.5 + 1.5 = 15

15 × 2 + 2 = 32

32 × 2.5 + 2.5 = 82.5

Hence, option b.

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