March 2, 2013 Update: As of version 2.7 of CardDroid Math Flash Cards, there’s a built-in problem set for 12 x [1 to 12].  Just go to the settings screen (tap the “gear” icon on the home screen), tap “Load a Built-in Problem Set,” choose the multiplication icon toward the top of the screen, now scroll down until you see “Multiplication: 12 x [1 to 12] = ?” or “Multiplication: [1 to 12] x 12] = ?”  If you want to customize it, follow the instructions below. Happy multiplying by 12!