Select the number from among the given options that can replace the question mark (?) in the following series.
9, 7, 28, 26, 65, 63, 126, 124, ?
1
137
2
217
3
136
4
215
Select the number from among the given options that can replace the question mark (?) in the following series.
9, 7, 28, 26, 65, 63, 126, 124, ?