When I saw that this question had "2 answers" I was expecting to find the first answer saying "3" from an idiot who had forgotten about Alaska and Hawaii, followed by a correction from someone else saying "5". I did not expect to see an answer from someone who is clever enough to remember Hawaii but simultaneously idiotic enough to forget Hawaii. I certainly didn't expect it to be the ultimate know-it-all himself! :-)
"Know-it-all" is a trifle unkind, Bernardo, don't you think? I mean, right here, we've both proved that anyone can make mistakes. Still...what the hey! Cheers