You found maths easy at what level? I had this problem too in high school, but it got really interesting first in college. There really are very interesting and challenging problems in college level math.
Well all levels really. In the last year of primary school (aged 10-11) I was taught (sort of) level 6, which wasn't unheard of by any means but it was quite rare. GCSEs (14-16) I took the level 9 and 10 paper (wasn't taught it), which was quite rare. I also asked if I could take my A levels early, but sadly my maths teacher died of cancer and we got a different teacher. I was really enthusiastic until then and often formulated my own ideas, which must have been done before at some point, but that doesn't matter to me - more that I came up with them on my own. For example, a way to find out, without a calculator if something is divisible by 11, and also how to solve those "magic square?" puzzles where all lines and diagonals have to add up to the same number. Anyway, then came my A levels (16-18), the first half of which I worked for, because it's the easier half, and is 50%, and then slacked for the last 50%, still getting the top grade with a big margin. I was quite annoyed that they'd taken out a lot of the harder stuff, as now I will be grouped with people less able at maths than me (that's not me being arrogant, it's me being honest. A levels are a complete shambles - sciences are being made easier and easier because less people are taking them. The whole point of tests is to distinguish people from eachother in terms of ability, but now that 1/4 - 1/3 gets the top grade, it's getting quite pointless as universities actually need to decide between people. That's my 1p anyway (going by the current exchange rates

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The reason I prefer Maths over English, History etc. (although I do like History) is because I don't have to write any essays. Any amount of boredom is worth that, IMO.
QFT. That is the one thing I absolutely hate. I miss not having to do essays at school after I chose my own subjects (Maths, Biology, Chemistry), but now that I'm at uni, we have to do 2 essays per term.
People used to ask me at school, or parents of friends would see my mum and ask us what I was doing at A level - I'd say Maths, Biology and Chemistry, and they'd cringe at the thought of it. However those were the subjects that I found the easiest and I don't understand why people cringe at the thought of them.