Hasn't stopped me though....
About 10 years later (whilst serving with the RAF) I had to do a specialist one-week course at Guildford Tech College, (a civilian establishment, obviously) concerning precision measurement, to do with calibration of precision measuring equipment.
When the Tutor said something like: "We now need to calculate the angle of a tapered bore, using Algebra, my heart sank, and I told him I was rubbish at Algebra.
So, he sat down with me, and step by step, went through a vary common sense, logical explanation, of how this particular problem was solved.
So, we made the calculation. AND I understood HOW I had arrived at the correct answer.....
So, had I got "brighter" over those 10 years?
I came to the conclusion: NO
I just had a Maths teacher that COULD'T teach!!!!
I learnt more about Maths in that week, than I did during 5 years at Secondary school!!!!!