Enigmas & puzzles
A calculated correction
Barry R Clarke
Miss Flogginum, the mathematics teacher, is strict about talking in class and has marched three of the culprits to the front. Ever since corporal punishment was abolished, she has taken pleasure in administering her own form of justice. From left to right, Antwit, Babble, and Crumble are made to stand facing away from the class in a straight line, and each has an unseen digit from 1-9 pinned to their back, no two of the three digits being repeated. No pupil can see their own digit and, in turn, each is required to make a correct statement about the twodigit number that they can see on the backs of the other two.