How many 5s are there in the following number sequences which are immediately preceded by 7 and immediately followed by 6? 7 5 5 9 4 5 7 6 4 5 9 8 7 5 6 7 6 4 3 2 5 6 7 8

1

According to the question, the condition which needs to be fulfilled is:

7-  5 - 6

7 5 5 9 4 5 7 6 4 5 9 8 7 5 6 7 6 4 3 2 5 6 7 8

There is only one such pair in the above series.