Select the number that can replace the question mark (?) in the following series.
45, 49, 57, ?, 105, 169
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 73.
Given series: 45, 49, 57, ?, 105, 169
The series follows this pattern:
45 + 4 = 49
49 + 8 = 57
57 + 16 = 73
73 + 32 = 105
105 + 64 = 169
So, the missing term in the series is 73.