Number Series Questions With Solution For SBI Clerk | Syndicate PO: Set- 20

D. 220

17 + 8 × 1 = 17 + 8 = 25

25 + 8 × 3 = 25 + 24 = 49

49 + 8 × 5 = 49 + 40 = 89

89 + 8 × 7 = 89 + 56 = 145

145 + 8 × 9 = 145 + 72 = 217

217 + 8 × 11 = 217 + 88 = 305

217 should be in place of 220.

E. 750

(0⁴ + 0³) – (0² + 0) = 0

(1⁴ + 1³) – (1² + 1) = 2 – 2 = 0

(2⁴ + 2³) – (2² + 2) = (16 + 8) – (4 + 2) = 18

(3⁴ + 3³) – (3² + 3) = (81 + 27) – (9 + 3) = 96

(4⁴ + 4³) – (4² + 4) = (256 + 64) – (16 + 4) = 300

(5⁴ + 5³) – (5² + 5) = (625 + 125) – (25 + 5) = 720

720 should be in place of 750.

C. 2

8 × 0.5 = 4

4 × 1 = 4

4 × 1. 5 = 6

6 × 2 = 12

12 × 2.5 = 30

30 × 3 = 90

4 should be in place of 2.

A. 79

11 + (5 × 1 + 1) = 17

17 + (5 × 2 + 3) = 30

30 + (5 × 3 + 5) = 50

50 + (5 × 4 + 7) = 77

77 + (5 × 5 + 9) = 111

111 + (5 × 6 + 11) = 152

77 should be in place of 79.

D. 12

0² + 1 × 2 = 2

1² + 2 × 3 = 7

2² + 3 × 4 = 16

3² + 4 × 5 = 29

4² + 5 × 6 = 46

5² + 6 × 7 = 67

6² + 7 × 8 = 92

16 should be in place of 12.

C. 140

The series follows the pattern:

25 + 3² × 1 = 34,

34 + 4² × 2 = 66,

66 + 5² × 3 = 141,

141 + 6² × 4 = 285,

285 + 7² × 5 = 530

Therefore, 141 should be in place of 140.

C. 324

The series follows the pattern,

7 × 2 – 2² = 10,

10 × 3 – 2³ = 22,

22 × 4 – 2⁴ = 72,

72 × 5 – 2⁵ = 328,

328 × 6 – 2⁶ = 1904

Therefore, 328 should be in place of 324.

A. 110

The numbers at the odd places follow the pattern:

85 – 1² = 84,

84 – 3² = 75,

75 – 5² = 50,

50 – 7² = 1

The numbers at the even places follow the pattern:

66 + 2² = 70,

70 + 4² = 86,

86 + 6² = 122

Therefore, 1 should be in place of 110.

D. 192

The series follows the pattern:

24 + 0!  = 25,

25 + 1! = 26,

26 + 2! = 28,

28 + 3! = 34,

34 + 4! = 58,

58 + 5! = 178

Therefore, 178 should be in place of 192.

B. 158