Which number will replace the question mark (?) in the following series?
7, 21, 35, ?, 63
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 49.
Given series: 7, 21, 35, ?, 63
The series follows this pattern:
7 × 3 = 21
7 × 5 = 35
7 × 7 = 49
7 × 9 = 63
So, the missing term in the series is 17.