1, 3, 4, 5, 10, 12, 5, 7, 9, 6
Rearrange them from smallest to largest:
1, 3, 4, 5, 5, 6, 7, 9, 10, 12
When there is just ONE middle number, it is the median.
But here, there is no ONE middle number, so we average
the TWO middle numbers, 5 and 6, and their average is
or 5.5. That's the median, 5.5
Edwin