Consider the following number sequence:
7 2 6 3 7 5 6 4 2 9 6 1 3 4 1 6 3 9 1 5 6 9 2 3 1 6 5 4 3 2 1 9 6 7 1 6 3
How many 6's are there in the above series each of which is immediately preceded by 1 or 5 and immediately followed by 3 or 9?
1
6
2
5
3
4
4
3
5
Not Attempted