Question

The digits 0 through 8 have been classified with the letters A,B and C. How would you classify the digit9? Why?

Answer 1

Do you possibly mean?
0 = A
1 = B
2 = C
3 = A
4 = B
5 = C
6 = A
7 = B
8 = C
9 = A

Answer 2

A 1 4 7
B 2 5
C 0 3 6 8 :)