NOTE.QuelLENcode

たくさんの可愛いものと、少しの銃と、それから狂気。
A lot of cute things and little guns and then MADNESS.

Quote reblogged from 帳面立寄所

好きな３桁の数字を適当に考える
たとえば236
それを二回続ける
236236
このようにしてできた数字は必ず7で割り切れるのだ

好きな３桁の数字を適当に思い浮かべて下さい｜2chコピペ保存道場

元の数＝100a+10b+cとすると2回続けて出来る数は
100000a+10000b+1000c+100a+10b+c
=100100a+10010b+1001c
=1001(100a+10b+c) ←1001で割り切れる（米１
=7*11*13(100a+10b+c)
よって、7だけでなく11・13でも割り切れる。

No.64647 | 2009-07-29 18:25 名無しのコピペ ◆mQop/nM

(via sametimesameplace) (via theemitter) (via msnr) (via petapeta)(via ch624) (via uessai-text)

なるほど1001=7×11×13なのね。これはうまい!11も101も素数だから楽しくないからねぇ。

(via hidemaroh)
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NOTE.QuelLENcode

たくさんの可愛いものと、少しの銃と、それから狂気。 A lot of cute things and little guns and then MADNESS.

たくさんの可愛いものと、少しの銃と、それから狂気。
A lot of cute things and little guns and then MADNESS.