1. Find the missing term: 28, 33, 31, 36, ?, 39

a) 32

b) 34

c) 38

d) 40

Explanation: The pattern is + 5, - 2, + 5, - 2,........

So, missing term = 36 - 2 = 34

2. Find the missing term: 5760, 960, ?, 48, 16, 8

a) 120

b) 160

c) 192

d) 240

Explanation: The pattern is ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2

So, missing term = 960 ÷ 5= 192

3. Find the missing term: 125, 80, 45, 20, ?

a) 5

b) 8

c) 10

d) 12

Explanation: The pattern is - 45, - 35, - 25,........

So, missing term = 20 - 15 = 5

4. Find the missing term: 1, 2, 6, 7, 21, 22, 66, 67, ?

a) 70

b) 134

c) 201

d) 301

Explanation: The pattern is + 1, × 3, + 1, × 3, + 1, × 3, + 1,.............

So, missing term = 67 × 3 = 201

5. Find the missing term: 1, 5, 13, 25, 41, ?

a) 51

b) 57

c) 61

d) 63

Explanation: The pattern is + 4, + 8, + 12, + 16,..........

So, missing term = 41 + 20 = 61

6. Find the missing term: 325, 259, 204, 160, 127, 105, ?

a) 94

b) 96

c) 98

d) 100

Explanation: The pattern is - 66, - 55, - 44, -33, - 22,...............

So, missing term = 105 - 11 = 94

7. Find the missing term: 165, 195, 255, 285, 345, ?

a) 375

b) 390

c) 420

d) 435

Explanation: Each number of the series is 15 multiplied by a prime number i.e., 15 × 11, 15 × 13, 15 × 17, 15 × 19, 15 × 23,..............

So, missing term = 15 × 29 = 435

8. Find the missing term: 1, 4, 10, 22, 46, ?

a) 64

b) 86

c) 94

d) 122

Explanation: The pattern is + 3, + 6, + 12, + 24,.............

So, missing term = 46 + 48 = 94

9. Find the missing term: 3, 12, 27, 48, 75, 108, ?

a) 147

b) 162

c) 183

d) 192

Explanation: The terms of the given series are 3 × 1

^{2}, 3 × 2

^{2}, 3 × 3

^{2}, 3 × 4

^{2}, 3 × 5

^{2}, 3 × 6

^{2},...............

So, missing term = 3 ×7

^{2}= 3 × 49 =147

10. Find the missing term: 7, 26, 63, 124, 215, 342, ?

a) 391

b) 421

c) 481

d) 511

Explanation: The terms of the given series are (2

^{3}- 1), (3

^{3}- 1), (4

^{3}- 1 ), (5

^{3}- 1), (6

^{3}- 1), (7

^{3}- 1),..........

So, missing term = (8

^{3}- 1) = (512 - 1) = 511.