Cole Johnson
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 Jul 20 comment Solve the equation. e and natural logs Any particular reason $e^x$ can't be $-2$? (imaginary roots) Jun 6 comment Can you show me a good approach for taking the limit of this function? Your question title provides no indication of the question. You should change it May 6 awarded Notable Question Apr 23 comment Common Core 6th grade math problem That would be the sensible way to do it (and in fact, the same way I was taught in 6th grade), but Common Core is terrible Apr 18 awarded Informed Mar 10 comment Is there a word similar to “iff” meaning “one and only one”? @TobiasKienzler True. It does look like a typo. But AFAIK, it's just as much a word as "xor" (which is short for "exclusive or") Mar 10 comment Is there a word similar to “iff” meaning “one and only one”? Should this be on English Language & Usage? Mar 10 comment Is every composite number the average of two primes? @Thomas Oh. I see. Thanks. I get all his conjectures/theorems/etc. mixed up a lot. Mar 10 comment Is every composite number the average of two primes? @Kevin $n$ is composite? The title says "is every composite number the average of two primes", not "is every $2n\ (n \not\in \mathbb{P})$ the average of two primes. Or am I reading your comment wrong? Mar 10 comment Is every composite number the average of two primes? @WilliamKurdahl To me, that could imply their life is from 20-3 to 20+3, but I'm probably reading it wrong (I get the joke though) Mar 9 comment Why is $-5^2=-25$? Exponents have a higher precedence than negation. Think of it as $0-5^2$ (exponents come before subtraction). Mar 1 comment Sum of the squares of numbers Substitute 4 into everything else if you want to take the "easiest" way. Feb 24 revised when is $n!+10$ a perfect square? removed space before question mark (some /minor/ grammar changes for character change requirement); new tags Feb 24 suggested approved edit on when is $n!+10$ a perfect square? Feb 15 comment How are first digits of $\pi$ found? "Square roots that are not integers are irrational" Counter: $\sqrt{.25}$ is not an integer, but is rational. Did you mean "Square roots that are not rational are irrational"? Feb 14 suggested rejected edit on Simplify a series of $\cos x$ or $\sin x$ Feb 11 comment Is there a size of rectangle that retains its ratio when it's folded in half? Being American, let me tell you: Not being able to scale a tabloid (11"x17") down to letter (8.5"X11") with no added margin is a real pain. And before you ask why I don't just use multiple pages, I'd need to print 3 sheets (because the majority of printers don't print borderless, the center of the tabloid wouldn't be printed if I did 2 pages at 100%), trim margins, then place them side by side to see the result. Jan 29 revised When does the integral converges? you "approved" using WolframAlpha? It should be "I 'proved' (using WA)..." Jan 29 suggested approved edit on When does the integral converges? Jan 26 awarded Notable Question