Select the number from among the given options that can replace the question mark (?) in the following series.
209, 205, 196, 180, ?, 119
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 155.
Given series: 209, 205, 196, 180, ?, 119
The series follows this pattern:
209 - 22 = 209 - 4 = 205
205 - 32 = 205 - 9 = 196
196 - 42 = 196 - 16 = 180
180 - 52 = 180 - 25 = 155
155 - 62 = 155 - 36 = 119
So, the missing term in the series is 155.