The given sequence is a combination of two series:I. 45, 47, 49, 51, 53 andII. 54, ?, 56, 57Clearly, II. consists of consecutive natural numbers, starting from 54.so, missing term = 55.
38.
83, 73, 93, 63, __, 93, 43. What number should fill the blank?
(A) 33
(B) 53
(C) 73
(D) 93
Solution:
This is a simple subtraction series in which a random number, 93, is interpolated as every third number. In the subtraction series, 10 is subtracted from each number to arrive at the next.
39.
Find the missing term: 66, 36, 18, ?
(A) 3
(B) 6
(C) 8
(D) 9
Solution:
Each term in the series is the product of the digits of the preceding term.So, missing term = 1 × 8 = 8
40.
17, 32, 19, 29, 21, 26, 23, ... choose which pair of numbers comes next?
(A) 25, 25
(B) 20, 22
(C) 23, 25
(D) 25, 22
Solution:
Here, there are two alternating patterns. The first begins with 17 and adds 2; the second begins with 32 and subtracts 3.