TGIF : Maths Lesson

Yesterday posted English lesson clip, today shall give Maths lesson to complete the week. At first, i thought this was correct as he did according to what the instructions say. But after looking at it the 2nd time, i realise, this is a Mathematics question. I started wondering, either student nowadays are not clever enough to answer this question or they are just too clever to be answering this kind of question, so they try something else instead. I don't think i see this kind of answer during my time. I recalled the most creative answer i ever give during a Mathematics test is when they ask for a decision tree and i drew out a big tree accompanied by a big question mark.