Counting numbers

 

1235 = 0

2678 = 3

3668 = 4

9000 = 4

8000 = 5

3218 = 2

6777 = 1

8888 = 8

1568 = ?

 

 


Answer

The solution: count the number of enclosed spaces within each digit. 1, 2, 3, 5, and 7 have no enclosed spaces 6, 9 and 0 have one enclosed space 8 has two. 4 has 1 or 0 depending on what font you are reading this in, so we left this digit out.