Our middle daughter has dyslexia, which we didn't recognise when she was young, even though her father was in the teaching profession. We thought she wasn't quite as bright as her two sisters, which was very remiss of us!
In fact she has a MENSA level intelligence, it wasn't until she went to university that it was discovered that she had dyslexia.
Her youngest son (15) has atypical dyslexia, which affects his maths as well as his reading. He is very bright too, but wasn't getting the right sort of help at school, so our girl now home schools him, and has tutors for topics she can't cover herself. He has already passed some of his GCSE's, but is doing them gradually.
Whilst I am not dyslexic I think I must suffer from dyscalculia, which is an inability to do maths. I have always struggled with the subject, even simple arithmetic, my parents employed tutors to help me, but I was never able to grasp it. Thank goodness for the advent of calculators.