Yes, I note the “knowledge required by” caveat. With possible exception of questions 2 (the trigonometry) and 7 (the equation question) this knowledge was imparted to me before I left primary school. Knowledge for the remaining two was certainly acquired in the first year or eighteen months of attending grammar school.
The comparison between making mistakes at work and making mistakes in GCSE Maths does not bear much scrutiny. Make a mistake at work and the effect is often profound. It may adversely affect your firm’s customers and may cause loss of business. It may cost your company a lot of money. In some cases it may have disastrous consequences for others, depending on what you do for a living. At the very least you’d be in for a rollicking.
Make a mistake in your GCSE Maths and it‘s not too much of a problem. In fact you can get four out of ten questions wrong and still obtain a ‘C’ grade pass. Made more mistakes than that? Not a disaster, you can always re-sit the entire thing. More than 4,000 candidates took GCSE Maths for the fifth time this year..
That is one of the reasons why Britain’s bosses believe UK school leavers lack the grit and determination to hack it in the world of work. Too many (but, before you bite my head off, not all) of them have been brought up to believe the world revolves around them and their needs, By the time they discover it does not their job has gone to somebody from Latvia.