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A fake Facebook event disguised as a math problem has been one of its top posts for 6 months
(www.engadget.com)
This is a most excellent place for technology news and articles.
This kind of problem falls under "communicating badly and acting smug when misunderstood". Use parenthesis and the problem goes away.
https://xkcd.com/169/
No it doesn't. It falls under adults forgetting the rules of Maths.
There is no problem, other than adults who have forgotten the rules.