The issue being discussed in this article is about a secondary 3 maths olympiad question which turned out to be a primary 5 logic question. The question was leaked out by students who took the math olympiad test, although they are not allowed to possess their phones at all times during the test.
I think this question is too hard for a primary 5 student to solve. This shows how stressful and advanced our education system is, compared to international level. The question was declared to be meant for 15 year-olds, but the fact that it appeared in a Primary 5 assignment is indeed very shocking, as the teachers expected these 11 year-olds to solve the question. I was even confused by the question when I first saw it, but even more appalled when I found out that it was a question in a primary school assignment. I feel that teachers should not set challenging questions which are beyond the students' abilities. Very few may be able to solve them, and even the some smarter ones face difficulties in solving them.