February 2023

For the first pattern, the trick is to realize that each number in the bottom row is always equal to the ten's place of the number above it divided by the one's place of the number above it.

In the second pattern, you need to realize that there are actually two unrelated patterns occurring at the same time. The pattern 8, 9, 10 where a number is added each time, and the pattern 6, 5, ? where a number is subtracted each time. Since the missing number is part of the second pattern, it would be 4.