This pattern is a little difficult to understand because it is difficult to find a pattern.
We can restate the pattern to make it easier for us:
1 2 5 10 17 26
3 4 7 12 18 28
6 8 9 14 21 30
11 13 15 16 23 32
18 20 22 24 25 34
27 29 31 33 35 36
On the first row, I see an additional change of 1, 3, 5, 7, and 9.
The second row has an additional change of 1, 3, 5, 6, and 10.
If we check the first column, the additional change is 2, 3, 5, 7, and 9.
Notice that the digit in the last column increases by 2 every column.
The one directly above 39863 is C) 39466.
- PM