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 Dec22 awarded Enthusiast Dec11 comment Interesting Property of Numbers in English There is such a systematic method of naming numbers in English, although the details escape me. Given that a 1000-factor increase in the size of the number results in roughly a 28-35 letter increase in name size ("three hundred and thirty three -illion" and so on) it's clear that the naming convention will never catch up. Consider also what it would take for the size of the name to grow as the number: you'd have to write in unary. Nov12 comment Why is $(x+h)^n$ written like this? Just a note...it isn't necessary to pick an answer immediately. It's usually advisable to wait a day or so to see what people have to say. I'm not saying this because Paul's answer is bad, only because other answers may be better explanations for you. Nov11 comment differentiation @Mariano: Isn't that strictly stronger than the OP's statement? Nov3 comment Attitude towards exercises in mathematics Did you mean "well-known" in paragraph 2? Sep9 awarded Editor Sep9 revised How to prove periodicity of $\sin(x)$ or $\cos(x)$ starting from the Taylor series expansion? Cleaned up grammar. Sep9 suggested approved edit on How to prove periodicity of $\sin(x)$ or $\cos(x)$ starting from the Taylor series expansion? Sep6 awarded Teacher Sep4 answered Project Euler, Problem #25 Jul22 comment What is the last digit of $\pi$? Sadly, your link to Niven's proof doesn't work. Feb28 awarded Supporter Jan24 awarded Autobiographer