I was quite amused by the folks who said that "I don't know any math past algebra" or "past trigonometry." If you know even a little algebra, to say nothing of trigonometry, you're ahead of the vast majority of the population, including those with college degrees.
I used to know quite a bit of math, having double-majored in it along with my music history, but I have forgotten most of it.
I'm completely cluess with tools. (Unless you count an screwdriver, which I can use to assemble a prefab unit such as a bookcase.) Even the simplest carpentry or home repairs are beyond me.
I am completely clueless in most normal social settings.
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