Riddles and Puzzles

[Kantor]

You're ruining the thread with your mathematical paradoxes!

So, here's an intelligent one.

Are you good at maths? Complete the last two in this sequence:

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