We’re amazed we didn’t know about this one, which was brought to our attention by commenter P.N.. It comes from the 2013 Specialist Mathematics Exam 2: The sole comment on this question in the Examination Report is: “All students were awarded [the] mark for this question.” Yep, the question is plain stuffed. We think, however, … Continue reading WitCH 37: A Foolproof Argument