Baker’s dozen = 13 (not 12) Easy. Foot = 12 inches (the length of the average man’s foot) Of course. I learned this in the second grade. 2 by 4 = 1.5 inches by 3.5 inches   What? 4 by 4 = 3 ½ inches by 3 ½ inches No way. 5/4 inches by 4 inches… Continue Reading