Consider the following pattern of numbers: 8 10 15 13 6 5 7 4 4 6 8 8 6 11 16 ? What is the number at ? in the above pattern?

To solve this, we look at the matrix of numbers. First, we check for a pattern across the rows (horizontally). Row 1: 8, 10, 15, 13... logic is not immediately obvious. Row 2: 6, 5, 7, 4... logic is not obvious. Since row-wise logic is unclea