Under the current exam system the pass mark is only 50%. Mind you from what I pick up from teachers the pass mark for GCSEs is much less than that. But then ours can be passed without doing any work or knowledge of the topic, as me and other staff have proved, just do resits every week.
The irony of the books is that they were spawned as the thinking had been the first few months were too like school, so they ‘invented’ a text / exercise book to stop it being like school. Lord knows how much these things cost to print.
Why they didn’t / don’t make an ‘end of course’ exam like the others on ultiflop, is and remains a mystery.