Kevin
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 Nov 23 awarded Editor Oct 22 comment What is the formula to generate this number sequence : 1 , 7 , 14, 30 If there's a pattern to your numbers, I don't see them from just the four you've shown. Could you provide more values from the sequence? Five or ten more ought to do it. Also, your code mentions "day". Does this have something to do with days in a week? Please explain what you're trying to do. Sep 10 comment Blue eyes: a logic puzzle @Keinstein, It is true that the islanders know both of those things. But those two facts alone are not sufficient to qualify as common knowledge. They need to know: "1) there are blue eyed people on the island. 2) Everyone is aware of fact 1. 3) Everyone is aware of fact 2. 4) Everyone is aware of fact 3... X) everyone is aware of fact X-1." for an X of any size. Prior to the guru's statement, each islander only knows facts 1 through N, which falls infinitely short of qualifying as common knowledge. Aug 20 comment Prove that if $x^n = y^n$ and $n$ is even, then $x = y$ or $x = -y$ Does this assume a nonzero n? Otherwise, you can disprove it by showing that 1^0 = 2^0. Or is the question asking you to "prove that if x^n = y^n for all even n..."? Jun 13 comment Change outcome of equation with variable that affects other variable What do 8250 and 65536 represent in the formula? Are you willing to change one or both of them? Nov 30 awarded Supporter Nov 2 awarded Tumbleweed Oct 25 awarded Autobiographer