5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6
How many even numbers are there in the sequence which are immediately preceded by an odd number & immediately followed by an even number?
1
2
3
6
4
Combination to be made is odd (even) even
Combinations are 7 2 6, 5 8 6, 5 2 2