Okay, 1st off, Happy Birthday!

2ndly, 10 cakes - 6 cakes = 4 cakes

Alice has 4 cakes left.

Oh and, Chocolate cake is the best!!!!!!!! You should have chocolate cake. And save some for me! 

If Alice ate SIX cakes, she probably has a 'Stomacake'      Hahahaha

Happy Birthday!