I know an adult who has obvious limitations with respect to intelligence. I would guess that her IQ is in the general ballpark of 80. She can read a newspaper, but any literature beyond a grade six or seven leel would be a stretch for her.
While she can function as an adult (and she has a very big heart) there are concepts that she has extreme difficulty in understanding.
Example/
A chequing acount.
Let’s say she and her spouse have $500 in the bank. They write cheque to pay a bill for $400. She also wants to buy something that is $200, her spouse says “no, we don’t have enough money.”
She can not understand how they only really have $100, when the bank balance says $500. No matter how you explain to her that a $400 cheque has been written and will be coming out of the account imminently, she can not grasp the concept that the money has been “spent” it just hasn’t been removed from the account yet.
As for me? I’ve never really thought about it. I have incredible memory skills and probably better-than-average reasoning abilities, but I’ve never really cared to know my IQ or general ranking. Most people who know me think I’m “very smart,” but I think I have incredible potential to be a complete dumbass. I guess I’d say “above average to advanced” but not outstanding.
So, I was a “straight A” student. Big deal! I know PhDs who are brilliant in their respective fields and completely inept when it comes to day-to-day common sense.