The real trouble is that people are really really weak in solving basic arithmetic problems.

I suppose it's like that saying: "The trouble with common sense is that it's not so common".

I didn't even pay attention to the last "add" or "finally 10" because it doesn't make sense (to me) not to add it. It's basic mathematics and basic logics as well.

Philosphically speaking, we now understand that people actually need to be told what to do in order to solve mundane problems such as the one mentioned above.

I think we truly failed as a generation,

cheers