The above series is a combination of two series,
7,8,9,10,11
and
8,9,10,11,12.
The series can be filled as 7 9 8 10 _9__ __11_ 10 12
what two number complete
7 9 8 10 ___ ___ 10 12
2 answers
The pattern is +2, -1. The missing numbers are 9 and 11.