How did a primary school pupil fails his maths test for putting 5x3=15?When does 5 times 3 not come to 15?
The answer is obviously never but you can understand the confusion for a primary school pupil in the US who got this marked incorrect.
The student's name has been removed from the exam and above the answer the teacher has awarded him a score of -1.
The workings out show that the hapless number cruncher had foolishly worked out the sum total by writing 3 '5's instead of 5 '3's.