Find the wrong number in the series.
225, 206, 188, 176, 165, 158, 153
225
188
176
153
B.
225-19 = 206206-18 = 188189-13 = 176176-11 = 165165-7 = 158158-5 = 153
206-17 = 189
The series should follow the order 19,17,13,11,7,5