Ахиллес и черепаха

Этот парадокс - одна из апорий (затруднений) Зенона. Автором этого парадоксального рассуждения является Зенон Элейский, древнегреческий философ, живший около двух с половиной тысяч лет назад (!).

Ахиллес и черепаха движутся по прямой в одну и ту же сторону, черепаха находится на расстоянии 1000 метров впереди Ахиллеса. Ахиллес бежит в 10 раз быстрее, чем ползёт черепаха.

Ахиллес никогда не догонит черепаху, ведь пока он пробежит 1000 метров до того места, где находилась черепаха, та уже отползёт на 100 метров вперёд. Когда же Ахиллес пробежит и эти 100 метров, черепаха отползёт ещё немного дальше. Это будет продолжаться бесконечно: каждый раз, когда Ахиллес бежит до места, где была черепаха, она уже отползёт на некоторое расстояние.

Сможете ли вы опровергнуть это утверждение?

Средняя оценка: 3.7 (93 голосов)
Темы:
Автор: gadaika, Чт, 03/25/2010 - 03:00

1   24.10.2018 - 04:03 Awobu03 пишет:

http://crosstv.ning.com/profiles/blogs/isosorbide-mononitrate-donde-puedo-comprar-sin-receta-por
http://ssbsavannah.ning.com/profiles/blogs/order-zyloprim-300-mg-on-sale-cheap-zyloprim-pills-com
http://hellyeahband.ning.com/profiles/blogs/progesterona-200mg-comprar-en-farmacia-online-fiable-andorra
http://showmeanswer.com/index.php?qa=3014&qa_1=c%C3%B3mo-realizar-pedido-tolterodina-sin-receta-online-andorra
http://whozwholive.ning.com/profiles/blogs/cefdinir-como-comprar-por-internet-estados-unidos-comprar-omnicef
http://lydlabs.ning.com/profiles/blogs/dicoxib-celecoxib-pharmacie-commander-livraison-24h-dicoxib-over
http://jawbite.ning.com/m/blogpost?id=6324711%3ABlogPost%3A1604504
http://supero.us.com/?option=com_k2&view=itemlist&task=user&id=50156
http://www.godry.co.uk/profiles/blogs/methylprednisolone-en-ligne-moins-cher-achat-livraison-gratuit
http://www.onfeetnation.com/m/blogpost?id=6595159%3ABlogPost%3A3332538
http://recampus.ning.com/profiles/blogs/farmacia-online-donde-comprar-azatioprina-50-mg-y-pagar-con
https://www.buddystalk.com/blogs/596/7554/donde-para-ordenar-anafranil-clomipramine-50mg-por-internet-pue
http://neolatino.ning.com/profiles/blogs/calcitriol-comprar-en-una-farmacia-en-linea-segura-rep-blica-de
https://ikriate.me/blogs/560/12967/vidalista-order-no-prescription-how-can-i-buy-tadalafil-safel
http://howidoit.ning.com/profiles/blogs/acheter-vrai-promethazinum-promethazine-promethazine-prix-amazon
http://snopeczek.hekko.pl/208358/purchase-cheap-zocor-online-where-purchase-simvastatin-needed
http://igotcomplaintsnetwork1.com/blogs/333/12177/farmacia-online-donde-comprar-acicvir-acyclovir-sin-receta-ahor
http://bioimagingcore.be/q2a/25514/maxolon-order-online-maxolon-uk-cheapest
http://crossroadshob.ning.com/profiles/blogs/como-fa-o-pra-comprar-latisse-bimatoprost-urgente-pela-internet
http://divinguniverse.com/blogs/post/33765
http://poemreader.ning.com/m/blogpost?id=6471796%3ABlogPost%3A46016288
http://shamrockballerz.ning.com/profiles/blogs/panagra-120-mg-como-comprar-pre-o-internet-portugal
http://ecobeautylounge.ning.com/profiles/blogs/order-vasotec-10mg-cheap-how-to-get-vasotec-pills
http://howidoit.ning.com/profiles/blogs/rabeprazol-comprar-en-farmacia-en-linea-fiable-estados-unidos

2   24.10.2018 - 04:03 Awobu03 пишет:

http://crosstv.ning.com/profiles/blogs/isosorbide-mononitrate-donde-puedo-comprar-sin-receta-por
http://ssbsavannah.ning.com/profiles/blogs/order-zyloprim-300-mg-on-sale-cheap-zyloprim-pills-com
http://hellyeahband.ning.com/profiles/blogs/progesterona-200mg-comprar-en-farmacia-online-fiable-andorra
http://showmeanswer.com/index.php?qa=3014&qa_1=c%C3%B3mo-realizar-pedido-tolterodina-sin-receta-online-andorra
http://whozwholive.ning.com/profiles/blogs/cefdinir-como-comprar-por-internet-estados-unidos-comprar-omnicef
http://lydlabs.ning.com/profiles/blogs/dicoxib-celecoxib-pharmacie-commander-livraison-24h-dicoxib-over
http://jawbite.ning.com/m/blogpost?id=6324711%3ABlogPost%3A1604504
http://supero.us.com/?option=com_k2&view=itemlist&task=user&id=50156
http://www.godry.co.uk/profiles/blogs/methylprednisolone-en-ligne-moins-cher-achat-livraison-gratuit
http://www.onfeetnation.com/m/blogpost?id=6595159%3ABlogPost%3A3332538
http://recampus.ning.com/profiles/blogs/farmacia-online-donde-comprar-azatioprina-50-mg-y-pagar-con
https://www.buddystalk.com/blogs/596/7554/donde-para-ordenar-anafranil-clomipramine-50mg-por-internet-pue
http://neolatino.ning.com/profiles/blogs/calcitriol-comprar-en-una-farmacia-en-linea-segura-rep-blica-de
https://ikriate.me/blogs/560/12967/vidalista-order-no-prescription-how-can-i-buy-tadalafil-safel
http://howidoit.ning.com/profiles/blogs/acheter-vrai-promethazinum-promethazine-promethazine-prix-amazon
http://snopeczek.hekko.pl/208358/purchase-cheap-zocor-online-where-purchase-simvastatin-needed
http://igotcomplaintsnetwork1.com/blogs/333/12177/farmacia-online-donde-comprar-acicvir-acyclovir-sin-receta-ahor
http://bioimagingcore.be/q2a/25514/maxolon-order-online-maxolon-uk-cheapest
http://crossroadshob.ning.com/profiles/blogs/como-fa-o-pra-comprar-latisse-bimatoprost-urgente-pela-internet
http://divinguniverse.com/blogs/post/33765
http://poemreader.ning.com/m/blogpost?id=6471796%3ABlogPost%3A46016288
http://shamrockballerz.ning.com/profiles/blogs/panagra-120-mg-como-comprar-pre-o-internet-portugal
http://ecobeautylounge.ning.com/profiles/blogs/order-vasotec-10mg-cheap-how-to-get-vasotec-pills
http://howidoit.ning.com/profiles/blogs/rabeprazol-comprar-en-farmacia-en-linea-fiable-estados-unidos

3   24.10.2018 - 04:21 Gekaj73 пишет:

http://www.myindiagate.com/community/blogs/post/116046 https://23bestcity.de/blogs/post/19343 http://vocal-buzz.ning.com/profiles/blogs/order-apcalis-sx-10-mg-low-price-where-to-purchase-tadalafil http://igotcomplaintsnetwork1.com/blogs/67/319/cyproheptadine-generique-sur-internet-au-rabais-sans-ordonnance http://techwarriorteam.ning.com/profiles/blogs/purchase-azopi-25mg-online-how-can-i-order-azathioprine-safely http://griffithchafey.ning.com/profiles/blogs/metformin-850mg-donde-comprar-buen-precio-espa-a http://www.immobiliaredicecca.it/?option=com_k2&view=itemlist&task=user&id=18207 http://bobford.ning.com/profiles/blogs/dutasteride-0-5mg-buy-without-rx-dutasteride-buy-new-york http://smssaff.sagada.org/m/blogpost?id=6287543%3ABlogPost%3A311417 http://facebookhitlist.com/profiles/blogs/abilify-10mg-order-online-how-can-i-order-aripiprazole-no http://www.facecool.com/profiles/blogs/farmacia-en-linea-donde-comprar-sildenafil-citrate-sin-receta-e-1 http://smssaff.sagada.org/m/blogpost?id=6287543%3ABlogPost%3A318138 http://www.facecool.com/profiles/blogs/xalatan-2-5mg-order-no-prescription-how-to-buy-latanoprost-in http://smssaff.sagada.org/profiles/blogs/levonorgestrel-0-25mg-o-en-acheter-comment-acheter-de http://www.8dep.info/blogs/404/3481/thorazine-100mg-comprar-online-mexico-comprar-chlorpromazine https://happyhare.org/blogs/148/1141/buy-nizoral-200-mg-online-can-i-buy-ketoconazole-in-trusted-ph http://showmeanswer.com/index.php?qa=20724&qa_1=order-famciclovir-250mg-sale-purchase-famvir-quick-delivery http://bioimagingcore.be/q2a/25968/precose-comprar-calidad-estados-unidos-comprar-precose-madrid http://my.d-discount.com/blogs/335/11834/farmacia-en-linea-donde-comprar-ofloxacino-300-mg-sin-receta-al http://www.facecool.com/profiles/blogs/paxil-40-mg-donde-comprar-sin-receta-fiable-m-xico-comprar http://www.myindiagate.com/community/blogs/post/104900 http://sallieanncooks.ning.com/profiles/blogs/comprar-o-gen-rico-do-lisinopril-hidroclorotiazida-5-12-5mg-e http://afrog617.ning.com/profiles/blogs/meilleur-site-achater-tadalafilum-60mg-baisse-prix-tadalafil-en http://barbershoppers.org/blogs/post/42313 http://ssbsavannah.ning.com/m/blogpost?id=6309576%3ABlogPost%3A711948 http://amusecandy.com/blogs/post/142553 http://mcspartners.ning.com/profiles/blogs/order-calcitriol-0-25mg-safely-how-can-i-purchase-rocaltrol-quick http://lifestir.net/blogs/post/71413 http://jaktlumaczyc.pl/5072/order-cheap-disulfiram-online-antabuse-prescription-needed http://foodtube.net/profiles/blogs/farmacia-online-donde-comprar-detrol-sin-receta-con-seguridad

4   24.10.2018 - 04:40 Bopuj35 пишет:

http://jaktlumaczyc.pl/4595/farmacia-comprar-furosemide-mastercard-comprar-farmacia http://neikasworld.ning.com/m/blogpost?id=6505014%3ABlogPost%3A777986 http://bygda.traktor.no/profiles/blogs/buy-orlistat-cheap-orlistat-order-online-reviews http://vocal-buzz.ning.com/profiles/blogs/sildenafil-orion-order-online-how-to-purchase-kamagra-soft-in https://www.olliesmusic.com/blog/26560/cГіmo-realizar-un-pedido-quetiapina-sin-receta-por-internet-comprar-quetiapi/ https://23bestcity.de/blogs/post/15129 http://ggwadvice.com//index.php?qa=8056&qa_1=comprar-disulfiramo-sin-receta-con-seguridad-m%C3%A9xico http://shamrockballerz.ning.com/m/blogpost?id=6388249%3ABlogPost%3A1395276 http://my.d-discount.com/blogs/69/3651/doxycycline-sur-le-net-commander-2018-acheter-vibramycin-100 http://www.onfeetnation.com/profiles/blogs/sildenafil-citrato-comprar-en-una-farmacia-en-linea-todo-en http://ask2learn.com/?qa=2613/risnia-internet-fiable-commander-risperidone-ligne-forum http://mcdonaldauto.ning.com/profiles/blogs/cheap-manforce-100-mg-buy-online-buy-manforce-from-a-certified http://poemreader.ning.com/profiles/blogs/viagra-sildenafil-citrate-25mg-comprar-env-o-libre

5   24.10.2018 - 04:41 Bopuj35 пишет:

http://jaktlumaczyc.pl/4595/farmacia-comprar-furosemide-mastercard-comprar-farmacia http://neikasworld.ning.com/m/blogpost?id=6505014%3ABlogPost%3A777986 http://bygda.traktor.no/profiles/blogs/buy-orlistat-cheap-orlistat-order-online-reviews http://vocal-buzz.ning.com/profiles/blogs/sildenafil-orion-order-online-how-to-purchase-kamagra-soft-in https://www.olliesmusic.com/blog/26560/cГіmo-realizar-un-pedido-quetiapina-sin-receta-por-internet-comprar-quetiapi/ https://23bestcity.de/blogs/post/15129 http://ggwadvice.com//index.php?qa=8056&qa_1=comprar-disulfiramo-sin-receta-con-seguridad-m%C3%A9xico http://shamrockballerz.ning.com/m/blogpost?id=6388249%3ABlogPost%3A1395276 http://my.d-discount.com/blogs/69/3651/doxycycline-sur-le-net-commander-2018-acheter-vibramycin-100 http://www.onfeetnation.com/profiles/blogs/sildenafil-citrato-comprar-en-una-farmacia-en-linea-todo-en http://ask2learn.com/?qa=2613/risnia-internet-fiable-commander-risperidone-ligne-forum http://mcdonaldauto.ning.com/profiles/blogs/cheap-manforce-100-mg-buy-online-buy-manforce-from-a-certified http://poemreader.ning.com/profiles/blogs/viagra-sildenafil-citrate-25mg-comprar-env-o-libre

6   24.10.2018 - 05:43 Elepu38 пишет:

http://thecorner.ning.com/m/blogpost?id=1921587%3ABlogPost%3A4517842 http://smssaff.sagada.org/profiles/blogs/amitriptylina-comprar-en-farmacia-en-linea-sin-gastos-de-envio-1 http://vivafengshui.ning.com/profiles/blogs/quel-site-pour-acheter-du-finasteride-5mg-finpecia-5-prix-en http://www.onfeetnation.com/profiles/blogs/comprar-metformina-gen-rico-envio-24-horas-internet-pre-o-do http://writeskills.ning.com/profiles/blogs/farmacia-online-donde-comprar-generico-primidone-250mg-de-calidad http://ggwadvice.com//index.php?qa=34221&qa_1=achat-discrete-tagra-paiement-visa-forum-vente-tagra-ligne http://network-marketing.ning.com/profiles/blogs/sildenafil-biogaran-120-mg-comprar-en-farmacia-online-con http://cqa.aaua.edu.ng/index.php?qa=10807&qa_1=apentral-domperidone-gen%C3%A9rico-internet-domperidone-generico http://social.leembe.com/blogs/post/29476 http://www.godry.co.uk/profiles/blogs/c-mo-realizar-un-pedido-cardizem-120mg-sin-receta-ahora-honduras http://www.collabzo.com/pwrportal/blogs/83/6656/elavil-25mg-puedo-comprar-con-ga http://higgs-tours.ning.com/profiles/blogs/c-mo-realizar-un-pedido-silfeldrem-sin-receta-pago-mastercard http://www.facecool.com/profiles/blogs/c-mo-realizar-un-pedido-azelastina-ahora-chile-azelastina-5mg https://www.buddystalk.com/blogs/503/5210/achat-express-clomiphene-citrate-baisse-prix-sans-ordonnance http://hellyeahband.ning.com/profiles/blogs/trazodona-50-mg-donde-puedo-comprar-de-forma-segura-el-salvador http://www.dzairmobile.com/fr/questions/33778/cerrokast-montelukast-comprar-gen%C3%A9rico-forma-segura-brasil http://www.facecool.com/profiles/blogs/como-puedo-comprar-generico-finax-sin-receta-en-internet-paraguay

7   24.10.2018 - 05:43 Elepu38 пишет:

http://thecorner.ning.com/m/blogpost?id=1921587%3ABlogPost%3A4517842 http://smssaff.sagada.org/profiles/blogs/amitriptylina-comprar-en-farmacia-en-linea-sin-gastos-de-envio-1 http://vivafengshui.ning.com/profiles/blogs/quel-site-pour-acheter-du-finasteride-5mg-finpecia-5-prix-en http://www.onfeetnation.com/profiles/blogs/comprar-metformina-gen-rico-envio-24-horas-internet-pre-o-do http://writeskills.ning.com/profiles/blogs/farmacia-online-donde-comprar-generico-primidone-250mg-de-calidad http://ggwadvice.com//index.php?qa=34221&qa_1=achat-discrete-tagra-paiement-visa-forum-vente-tagra-ligne http://network-marketing.ning.com/profiles/blogs/sildenafil-biogaran-120-mg-comprar-en-farmacia-online-con http://cqa.aaua.edu.ng/index.php?qa=10807&qa_1=apentral-domperidone-gen%C3%A9rico-internet-domperidone-generico http://social.leembe.com/blogs/post/29476 http://www.godry.co.uk/profiles/blogs/c-mo-realizar-un-pedido-cardizem-120mg-sin-receta-ahora-honduras http://www.collabzo.com/pwrportal/blogs/83/6656/elavil-25mg-puedo-comprar-con-ga http://higgs-tours.ning.com/profiles/blogs/c-mo-realizar-un-pedido-silfeldrem-sin-receta-pago-mastercard http://www.facecool.com/profiles/blogs/c-mo-realizar-un-pedido-azelastina-ahora-chile-azelastina-5mg https://www.buddystalk.com/blogs/503/5210/achat-express-clomiphene-citrate-baisse-prix-sans-ordonnance http://hellyeahband.ning.com/profiles/blogs/trazodona-50-mg-donde-puedo-comprar-de-forma-segura-el-salvador http://www.dzairmobile.com/fr/questions/33778/cerrokast-montelukast-comprar-gen%C3%A9rico-forma-segura-brasil http://www.facecool.com/profiles/blogs/como-puedo-comprar-generico-finax-sin-receta-en-internet-paraguay

8   24.10.2018 - 06:03 Ukigo40 пишет:

http://adrenalineprovinggrounds.ning.com/profiles/blogs/donde-para-ordenar-fexoalergic-fexofenadine-sin-receta-de-calidad
http://griffithchafey.ning.com/profiles/blogs/sildenafil-genericon-comprar-com-garantia-portugal
http://howidoit.ning.com/profiles/blogs/budesonida-0-1mg-comprar-gen-rico-pela-net-rep-blica-portuguesa
http://football.ning.com/profiles/blogs/viagra-sildenafil-citrate-comprar-urgente-pela-net-no-brasil
http://vivafengshui.ning.com/profiles/blogs/amoxicilline-bas-prix-amoxicilline-boite-de-8-prix
http://www.holidayscanada.com/blogs/216/7203/chlorambucil-bon-prix-sans-ordonnance-leukeran-livraison-ups
http://crossroadshob.ning.com/profiles/blogs/ramipril-2-5mg-comprar-en-una-farmacia-online-con-env-o-gratis
http://soulradio.ning.com/profiles/blogs/carbamazepine-order-online-can-i-buy-tegretol-no-prescription
http://techwarriorteam.ning.com/profiles/blogs/trimethoprime-800-mg-baisse-prix-sur-le-net-securise-prix-du
http://lydlabs.ning.com/profiles/blogs/para-comprar-generico-clomifeno-sin-receta-env-o-gratis-espa-a
http://dmoney.ru/29761/purchase-generic-licosil-50-mg-cheap-licosil-for-sale-usa
http://showmeanswer.com/index.php?qa=14793&qa_1=se-puede-comprar-generico-compazine-mg-con-seguridad-espa%C3%B1a
http://bygda.traktor.no/profiles/blogs/site-seguro-para-comprar-fluconazol-diflucan-200-mg-gen-rico-com
http://www.taffebook.com/blogs/1566/6409/recherche-achat-mebeverine-135mg-faut-il-une-ordonnance-pour
http://techakhil.byethost4.com/ques2ans/index.php?qa=1904&qa_1=comprar-generico-pantoprazol-receta-farmacia-online-ecuador
http://writeskills.ning.com/profiles/blogs/order-cheap-fincar-5-mg-cost-of-fincar-at-meijers
http://facebookhitlist.com/profiles/blogs/farmacia-online-donde-comprar-generico-ketoconazol-200-mg-al
http://ecobeautylounge.ning.com/profiles/blogs/tamoxifen-como-comprar-con-seguridad-nicaragua-comprar-nolvadex
http://ykien.info/index.php?qa=35042&qa_1=doxepina-25mg-como-puedo-comprar-de-forma-segura-andorra
http://www.holidayscanada.com/blogs/106/3204/farmacia-online-donde-comprar-careprost-bimatoprost-sin-receta
http://mcdonaldauto.ning.com/profiles/blogs/farmacia-online-donde-comprar-lasix-40mg-env-o-gratis-guatemala
http://techakhil.byethost4.com/ques2ans/index.php?qa=22346&qa_1=site-pour-acheter-zetia-ezetimibe-ezetimibe-ses-generique
http://howidoit.ning.com/profiles/blogs/c-mo-realizar-un-pedido-hidroxicina-online

9   24.10.2018 - 06:03 Ukigo40 пишет:

http://adrenalineprovinggrounds.ning.com/profiles/blogs/donde-para-ordenar-fexoalergic-fexofenadine-sin-receta-de-calidad
http://griffithchafey.ning.com/profiles/blogs/sildenafil-genericon-comprar-com-garantia-portugal
http://howidoit.ning.com/profiles/blogs/budesonida-0-1mg-comprar-gen-rico-pela-net-rep-blica-portuguesa
http://football.ning.com/profiles/blogs/viagra-sildenafil-citrate-comprar-urgente-pela-net-no-brasil
http://vivafengshui.ning.com/profiles/blogs/amoxicilline-bas-prix-amoxicilline-boite-de-8-prix
http://www.holidayscanada.com/blogs/216/7203/chlorambucil-bon-prix-sans-ordonnance-leukeran-livraison-ups
http://crossroadshob.ning.com/profiles/blogs/ramipril-2-5mg-comprar-en-una-farmacia-online-con-env-o-gratis
http://soulradio.ning.com/profiles/blogs/carbamazepine-order-online-can-i-buy-tegretol-no-prescription
http://techwarriorteam.ning.com/profiles/blogs/trimethoprime-800-mg-baisse-prix-sur-le-net-securise-prix-du
http://lydlabs.ning.com/profiles/blogs/para-comprar-generico-clomifeno-sin-receta-env-o-gratis-espa-a
http://dmoney.ru/29761/purchase-generic-licosil-50-mg-cheap-licosil-for-sale-usa
http://showmeanswer.com/index.php?qa=14793&qa_1=se-puede-comprar-generico-compazine-mg-con-seguridad-espa%C3%B1a
http://bygda.traktor.no/profiles/blogs/site-seguro-para-comprar-fluconazol-diflucan-200-mg-gen-rico-com
http://www.taffebook.com/blogs/1566/6409/recherche-achat-mebeverine-135mg-faut-il-une-ordonnance-pour
http://techakhil.byethost4.com/ques2ans/index.php?qa=1904&qa_1=comprar-generico-pantoprazol-receta-farmacia-online-ecuador
http://writeskills.ning.com/profiles/blogs/order-cheap-fincar-5-mg-cost-of-fincar-at-meijers
http://facebookhitlist.com/profiles/blogs/farmacia-online-donde-comprar-generico-ketoconazol-200-mg-al
http://ecobeautylounge.ning.com/profiles/blogs/tamoxifen-como-comprar-con-seguridad-nicaragua-comprar-nolvadex
http://ykien.info/index.php?qa=35042&qa_1=doxepina-25mg-como-puedo-comprar-de-forma-segura-andorra
http://www.holidayscanada.com/blogs/106/3204/farmacia-online-donde-comprar-careprost-bimatoprost-sin-receta
http://mcdonaldauto.ning.com/profiles/blogs/farmacia-online-donde-comprar-lasix-40mg-env-o-gratis-guatemala
http://techakhil.byethost4.com/ques2ans/index.php?qa=22346&qa_1=site-pour-acheter-zetia-ezetimibe-ezetimibe-ses-generique
http://howidoit.ning.com/profiles/blogs/c-mo-realizar-un-pedido-hidroxicina-online

10   24.10.2018 - 06:09 Ujuso07 пишет:

http://vivafengshui.ning.com/profiles/blogs/acarbose-25mg-order-no-rx-legal-online-acarbose
http://www.godry.co.uk/m/blogpost?id=6439912%3ABlogPost%3A1370741
http://griffithchafey.ning.com/m/blogpost?id=6604043%3ABlogPost%3A1580429
http://laguiadelasvegas.com/afiliados/blogs/post/15613
http://crossroadshob.ning.com/profiles/blogs/trazodone-vrai-bon-marche-commander-sans-ordonnance-trazodone-au
http://www.facecool.com/profiles/blogs/desogestrel-etinilestradiol-0-02-0-15mg-donde-comprar-sin-receta
http://adrenalineprovinggrounds.ning.com/profiles/blogs/sinequan-doxepin-donde-comprar-sin-receta-de-calidad-comprar
http://bygda.traktor.no/profiles/blogs/achat-express-donepezil-5mg-bas-prix-site-francais-aricept-made
http://www.1friend.com/blogs/1372/4607/commander-warfarine-2-mg-acheter-warfarine-en-ligne-avis
http://bobford.ning.com/profiles/blogs/indapamide-moins-cher-en-ligne-rapide-prix-g-n-rique-indapamide
http://lifestir.net/blogs/post/30000
http://poemreader.ning.com/profiles/blogs/acheter-toprol-100-mg-en-ligne-metoprolol-achat-avec-paypal
http://barbershoppers.org/blogs/post/38490
http://tnfdjs.ning.com/profiles/blogs/apcalis-sx-buy-cheap-how-can-i-buy-tadalafil-in-trusted-pharmacy

Познавательно

Человеческая рука есть одна из первых счетных машин!

Движением пальца. Положите обе руки рядом на стол и протяните пальцы. Каждый палец слева направо будет означать соответствующее порядковое число: первый слева — 1, второй — 2, третий — 3, четвертый — 4 и т. д. до десятого, который будет обозначать число 10. Например, Нам необходимо умножить 7 на 9. Теперь поднимите седьмой палец. Число пальцев, лежащих налево от поднятого пальца, будет числом десятков произведения, а число пальцев направо — числом единиц. Налево от поднятого пальца лежат 6 пальцев, а направо — 3. Значит, результат умножения 7 на 9 равен 63.

Это удивительное на первый взгляд механическое умножение тотчас же станет понятным, если вспомнить, что сумма цифр в каждом произведении чисел таблицы умножения на девять равна девяти, а число десятков в произведении всегда на 1 меньше того числа, которое мы умножаем на 9. Поднятием соответствующего пальца это мы и отмечаем, а следовательно, и умножаем.

другие факты »