41.
Find the missing term :- 3, 15, ?, 63, 99, 143
- (A) 27
- (B) 35
- (C) 45
- (D) 56
Solution:
The terms of the given series are (22 - 1), (42 - 1),................,(82 - 1), (102 - 1), (122 - 1)So, missing term = (62 - 1) = (36 - 1) = 35
42.
Find the missing term: 4, 6, 9, 131/2, ?
- (A) 171/2
- (B) 19
- (C) 201/4
- (D) 223/4
Solution:
The pattern is × 3/2.So, missing number = 131/2 × 3/2 = 27/2 × 3/2 = 81/4 = 201/4.
43.
Find the missing term: 4, 10, ?, 82, 244, 730
- (A) 24
- (B) 28
- (C) 77
- (D) 218
Solution:
Each number in the series is 2 less than thrice the preceding number. So, missing number = (10 x 3) - 2 = 28
44.
15, __, 27, 27, 39, 39. What number should fill the blank?
- (A) 51
- (B) 39
- (C) 23
- (D) 15
Solution:
In this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.
45.
Find the missing term: 5, 2, 7, 9, 16, 25, ?
- (A) 41
- (B) 45
- (C) 48
- (D) 52
Solution:
Each term in the series, except the first two terms, is the sum of the preceding two terms.So, missing term = 16 + 25 = 41
46.
Find the missing term : 90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3
- (A) 150
- (B) 175
- (C) 225
- (D) 250
Solution:
Clearly, 90 = 30 × 3, 180 = 6 × 30, 12 = 2 × 6, 50 = 25 × 2, 100 = 4 × 25, 200 = 50 × 4 So, missing term = 3 × 50 = 150
47.
3, 8, 13, 18, 23, 28, 33, ... choose which pair of numbers comes next?
- (A) 39, 44
- (B) 38, 44
- (C) 38, 43
- (D) 37, 42
Solution:
In this simple addition series, each number is 5 greater than the previous number.
48.
544, 509, 474, 439, ... What number should come next?
- (A) 404
- (B) 414
- (C) 420
- (D) 445
Solution:
This is a simple subtraction series. Each number is 35 less than the previous number.
49.
14, 14, 26, 26, 38, 38, 50, ... choose which pair of numbers comes next?
- (A) 60, 72
- (B) 50, 62
- (C) 50, 72
- (D) 62, 62
Solution:
In this simple addition with repetition series, each number in the series repeats itself, and then increases by 12 to arrive at the next number.
50.
2, 6, 18, 54, ... What number should come next?
- (A) 108
- (B) 148
- (C) 162
- (D) 216
Solution:
This is a simple multiplication series. Each number is 3 times more than the previous number.