How many 3s are there in the following sequence which are neither preceded by 6 nor Immediately followed by 9?

93 66 39 59 37 89 16 39 63 9

Two

We have,

93 66 39 59 37 89 16 39 63 9

So,

93 66 39 59 37 89 16 39 63 9

3's which are neither preceded by 6 nor immediately followed by 9, means we need to count the number of appearances of 3 not in the '6 3 9' pattern.

So, it appears two times as shown above.