I missed the conversation about maths problems earlier - sorry. When ds2 was heading for senior school, he and his friend sat the 11+. His friend’s mum and I bought them the 11+ practise books, and then we got hooked on them too - we’d spend the morning at my table, drinking coffee and doing maths problems, or verbal reasoning - sad but fun.
I do have a maths text book I bought for myself, so I could go back over my O level maths, and see if I could get a better grip on it. I’ve found I enjoy doing maths puzzles when I’m not going to have to sit exams or look dim in class - I like the logic and the fact that there is a correct answer, and sometimes I can find it.
My dad was a maths teacher, but when I was struggling with my homework, he wouldn't sit with me and help me work through the problems I was having trouble with - he thought that was cheating - so he would make up a new problem, demonstrating the thing I was supposed to be doing, and would work through that problem with me, then say “Now - you understand what you need to do, so you can apply it to your homework”. As a teenager, I thought it was incredibly unfair that I had a maths teacher for a dad and couldn’t benefit from it by getting my homework partly done for me.