To find the missing number, let's analyze the pattern:
Starting from the first row:
2 - 3 = -1
3 - 9 = -6
9 - 5 = 4
Moving to the second row:
8 - ? = 3
? - 7 = 3
7 - 8 = -1
From the third row:
-4 - 2 = -6
2 - 4 = -2
4 - 6 = -2
From the fourth row:
5 - 2 = 3
2 - 8 = -6
8 - 1 = 7
It appears that the pattern for the missing number is that each number is obtained by subtracting the previous two numbers. So, for the second row, the missing number would be 8 - 3 = 5.
Therefore, the completed pattern is:
2 - 3 9 5
8 5 3 7
-4 2 -4 -6
5 3 2 8
