Math puzzle has me stumped

[cwmax2000]

1=3
2=3
3=5
4=4
5=4
6=3
7=5
8=5
9=4
10=3
11=?
12=?

I can not figure this out and its driving me nuts., i split odd/ even, no luck..i need help... thanks Cmax:cool:

 

[Deleted member 4993]

1=3
2=3
3=5
4=4
5=4
6=3
7=5
8=5
9=4
10=3
11=?
12=?

I can not figure this out and its driving me nuts., i split odd/ even, no luck..i need help... thanks Cmax:cool:

Very old puzzle - that's why I know it

Number of letters....

11 = eleven = 6

12 = twelve = 6