At the end of every month I find myself doing the does-this-month-have-30-or-31-days shuffle. Usually I will recite in my head the trusty “Thirty days has September, April June and November” ditty to set me straight. But sometimes, when I don’t want to do all that remembering and thinking, I’ll resort to the knuckle method (pictured above.) ItContinue reading “How Many Months Have 28 Days?”