Number Series Questions and Answers Part-4

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