Maybe this is very old question, but I just have fun with my friend about it, and we all wondering: Why does it have the same result when I submit the equal for every year? For example:
2012
2 0 1 2=5
20 12=32
3 2=5

2011
2 0 1 1=4
20 11=31
3 1=4

2043
2 0 4 3=9
20 43=63
6 3=9

2210
2 2 1 0=5
22 10=32
3 2=5

1999
1 9 9 9=28
2 8=10
1 0=1
19 99=118
1 1 8=10
1 0=1
Any answer, please?

Many thanks and Happy new Year :)