Which of the following numbers will replace the question mark (?) in the given series?
164, 172, 145, ?, 84
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 209.
Given series: 164, 172, 145, ?, 84
The series follows this pattern:
164 + 23 = 164 + 8 = 172
172 - 33 = 172 - 27 = 145
145 + 43 = 145 + 64 = 209
209 - 53 = 209 - 125 = 84
So, the missing term in the series is 209.