General Studies · Number Series

Refer to the following series and answer the question that follows (all numbers are single digit numbers only). Counting to be done from left to right only. (Left) 2 1 7 9 4 5 3 4 4 1 8 2 2 4 4 9 7 6 9 9 4 6 2 9 9 8 7 (Right) How many such odd numbers are there (from left to right) each of which is immediately preceded by an odd number and also immediately followed by an odd number?