Will be honest, my dad was (say was, as now dead) dyslexic and my mom didn't finish high school as her mom made her go to work as soon as she turned 16.The clock thing is a big problem.
Many don't even know how to make the hands go round
One thing they were both good at was maths, and they taught me (and I just sucked at it). They didn't teach me to read and write because both weren't very good at it (that's what they told me). I have a 2:1 degree in English language and literature and worked really hard to get into a really prestigious university.
My dad was in top of his classes for maths- was told he would have a promising education at uni, but was kicked out of sixth form for vandalism (didn't take teen tit lightly in the 70s).
I am still bleeping terrible at maths. Took me 2 goes to pass my GCSE. Also took me an embarrassingly long time to tell the time.
Let's hope having dumbo parents doesn't rub off on the little one in the future.
However, you're parents don't necessarily have to be skilled at something for a child to "click" with it.