Select the number from among the given options that can replace the question mark (?) in the following series.
18, 34, 40, 78, 84, 166, 172, ?
1
344
2
342
3
324
4
322
Select the number from among the given options that can replace the question mark (?) in the following series.
18, 34, 40, 78, 84, 166, 172, ?