Problem of the month:

 

A lady cooked brownies for her garden club.  Her husband came home and said,” The house smells like brownies.  Can I have one?”  To which his wife replied,” I only have 12 and I need them all.  So don’t eat any of them!”  When his wife left the room, the husband proceeded to eat three brownies, but he wasn’t afraid of getting in trouble with his wife.  At the meeting, she served 11 ladies brownies and had one left for herself.  How is this possible?