{"id":570,"date":"2015-10-31T14:33:09","date_gmt":"2015-10-31T13:33:09","guid":{"rendered":"https:\/\/paul-anton.vanhandel.at\/?p=570"},"modified":"2026-07-30T17:42:15","modified_gmt":"2026-07-30T15:42:15","slug":"mathemagisch","status":"publish","type":"post","link":"https:\/\/paul-anton.vanhandel.at\/?p=570","title":{"rendered":"MatheMagisch ?"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container hundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-overflow:visible;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"width:104% !important;max-width:104% !important;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_3 1_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:33.333333333333%;--awb-margin-top-large:0px;--awb-spacing-right-large:3.8399999999999%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:5.76%;--awb-width-medium:33.333333333333%;--awb-spacing-right-medium:3.8399999999999%;--awb-spacing-left-medium:5.76%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-image-element\" style=\"--awb-caption-title-font-family:var(--h2_typography-font-family);--awb-caption-title-font-weight:var(--h2_typography-font-weight);--awb-caption-title-font-style:var(--h2_typography-font-style);--awb-caption-title-size:var(--h2_typography-font-size);--awb-caption-title-transform:var(--h2_typography-text-transform);--awb-caption-title-line-height:var(--h2_typography-line-height);--awb-caption-title-letter-spacing:var(--h2_typography-letter-spacing);\"><span class=\" fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><a href=\"https:\/\/paul-anton.vanhandel.at\/wp-content\/uploads\/2015\/10\/IMG_4640.jpg\" class=\"fusion-lightbox\" data-rel=\"iLightbox[026e0e970d416cebfdc]\" data-title=\"IMG_4640\"> <img decoding=\"async\" alt=\"Mathemagisch\" src=\"https:\/\/paul-anton.vanhandel.at\/wp-content\/uploads\/2015\/10\/IMG_4640.jpg\" class=\"img-responsive\"\/><\/a><\/span><\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 fusion_builder_column_2_3 2_3 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:66.666666666667%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.88%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:3.84%;--awb-width-medium:66.666666666667%;--awb-spacing-right-medium:2.88%;--awb-spacing-left-medium:3.84%;--awb-width-small:100%;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><p>Neulich bekam ich nebenstehende Rechenanweisung. Nat\u00fcrlich gleich probiert, nat\u00fcrlich hat es funktioniert.<\/p>\n<p>Aber warum?<\/p>\n<p>Wenn man sich die Rechenanweisungen als Gleichung schreibt, sieht das so aus:<\/p>\n<p>Sei <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/43\/ql_f38d6a0c24603e2551da772663aa6943_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"S\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"\/> die Schuhgr\u00f6\u00dfe<br \/>\nSei <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/de\/ql_98809aabe85f86553ea517c324d689de_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"B\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/> das Geburtsjahr<br \/>\nSei <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/20\/ql_ccba4094148e7d4e2ec68100254a7520_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Y\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/> das aktuelle Jahr, also zum Zeitpunkt des Schreibens dieses Posts 2015<\/p>\n<p>Weiters vereinbaren wir, dass das Alter <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/05\/ql_725649e0f6def1977abe1f4d6a4e7405_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"13\" style=\"vertical-align: 0px;\"\/> sich errechnet aus <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/0a\/ql_3c574fa742cff178e9aef2e436153a0a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Y-B\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"50\" style=\"vertical-align: 0px;\"\/><\/p>\n<p>Damit kommen wir zu folgender Gleichung:<\/p>\n<p>[ (5 cdot S +50 ) cdot 20 + 1015 \u2013 B = 100 cdot S + A\u00a0]<\/p>\n<p>Die linke Seite der Gleichung ist einfach die Umsetzung der Rechenanweisungen, die rechte Seite ( <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/0e\/ql_75dcfc3d61f6301087dbd56a49bf1d0e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"100 cdot S + A\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"104\" style=\"vertical-align: -2px;\"\/> ) die Darstellung des Ergebnisses. Wenn also eine vierstellige Zahl als Ergebnis herauskommt, dann sind die 100er und 1.000er Stelle die Schuhgr\u00f6\u00dfe <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/43\/ql_f38d6a0c24603e2551da772663aa6943_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"S\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"\/> (daher <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/e7\/ql_80da8e940626569c880ccc090a82ebe7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"S cdot 100\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"71\" style=\"vertical-align: 0px;\"\/>) und die Zehner- und Einerstelle bilden das Alter <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/05\/ql_725649e0f6def1977abe1f4d6a4e7405_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"13\" style=\"vertical-align: 0px;\"\/>.<\/p>\n<p>Hier sieht man schon die Einschr\u00e4nkungen, der die Magie unterliegt. Die konkrete Rechenanweisung funktioniert n\u00e4mlich\u00a0nur, wenn man in diesem Jahr schon Geburtstag gehabt hatte und auch nur f\u00fcr Menschen \u00e4lter als 9 und j\u00fcnger als 100 Jahre. Also <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/05\/ql_fa1003986482007760e672396d8adc05_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"9 < A < 100\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"96\" style=\"vertical-align: -2px;\"\/>. Nat\u00fcrlich mu\u00df auch die Schuhgr\u00f6\u00dfe zweistellig, also <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/8f\/ql_30c0d4b851d095440e1087553a3efa8f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"9<S<100\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"95\" style=\"vertical-align: -2px;\"\/> sein.<\/p>\n<p>Warum die Anweisung unter diesen Rahmenbedingungen\u00a0funktioniert, wird schnell klar, wenn man die linke Seite der Gleichung ein wenig umformt und einfach einmal die Klammer aufl\u00f6st:<\/p>\n<p>[ 100 cdot S + 1000 + 1015 \u2013 B = 100 cdot S + A\u00a0]<\/p>\n<p>Wir sehen, dass links mit <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/3f\/ql_0e2847c1e4a4d914364878a3b7ee4e3f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"1000+1015\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"91\" style=\"vertical-align: -2px;\"\/> das aktuelle Jahr <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/20\/ql_ccba4094148e7d4e2ec68100254a7520_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"Y\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/> (wir schreiben das Jahr 2015 <span style=\"color: #808080;\">\u2013<\/span><em><span style=\"color: #808080;\"> genau, noch 185 Jahre<\/span>\u00a0<\/em>????) steht.<br \/>\nIm rechten der Teil der Gleichung haben wir f\u00fcr <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/93\/ql_cdf7669102ec8ab86dc6bd7c6a5f9093_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A = Y-B\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"87\" style=\"vertical-align: 0px;\"\/>, (<img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/fa\/ql_d1313d2ca3fb1810d50be85e384e8bfa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"A = 2015-B\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"108\" style=\"vertical-align: 0px;\"\/> f\u00fcr heuer) vereinbart, also setzen wir dies ein und erhalten die Gleichung:<\/p>\n<p>[ 100 cdot S + 2015 -B = 100 cdot S + 2015 \u2013 B ]<\/p>\n<p>Es stehen nunmehr auf beiden Seiten der Gleichung die gleichen Terme <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/5f\/ql_b1511c125ccd24aaec9dfb09ef01175f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"rightarrow 1=1\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"129\" style=\"vertical-align: -4px;\"\/>, und dieses gilt demnach (unter den oben angef\u00fchrten Rahmenbedingungen f\u00fcr alle <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/43\/ql_f38d6a0c24603e2551da772663aa6943_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"S\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"12\" style=\"vertical-align: 0px;\"\/> und alle <img decoding=\"async\" src=\"https:\/\/quicklatex.com\/cache3\/de\/ql_98809aabe85f86553ea517c324d689de_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"B\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"14\" style=\"vertical-align: 0px;\"\/>.<\/p>\n<p>Die Rechenanweisung funktionert demnach allgemein<\/p>\n<p>[ forall S in mathbb mid 9 < S < 100 wedge forall B in mathbb mid 1915 < B < 2005 ]<\/p>\n<\/div><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Mit einigen Rechenanweisungen soll aus der Schuhgr\u00f6\u00dfe auf das Alter geschlossen werden. Funktioniert das wirklich oder ist es Magie?<br \/>\nHier gibt es die Antwort! <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99,1,102],"tags":[32],"class_list":["post-570","post","type-post","status-publish","format-standard","hentry","category-99","category-allgemein","category-mathematik","tag-mathematik"],"_links":{"self":[{"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/posts\/570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=570"}],"version-history":[{"count":1,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/posts\/570\/revisions"}],"predecessor-version":[{"id":876,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=\/wp\/v2\/posts\/570\/revisions\/876"}],"wp:attachment":[{"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/paul-anton.vanhandel.at\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}