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forum.matefbc.ro • Vezi subiect - Petru & Sandu

Petru & Sandu

Matematica distractiva

Petru & Sandu

Mesajde dBSh » Dum Aug 09, 2009 6:32 am

Un profesor de matematica avea in clasa doi copii foarte inteligenti,si in plus,cu cunostiinte deosebite de matematica,Sandu si Petru.Intr-o zi le spune:"Am ales doua numere naturale strict mai mari ca unu,nu neaparat diferite.Pe aceste doua foi de hartii am scris,pe prima pentru tine Sandu,pentru ca initiala prenumelui tau incepe cu S,de la suma ,suma acestor numere ,iar pe a doua pentru tine Petre,pentru ca initiala numelui incepe cu P de la produs,produsul lor.V-as ruga sa nu comunicati intre voi si sa incercati pana maine sa deduceti fiecare numerele alese de mine."Amandoi elevii au raspuns insa prompt:"Este imposibil pentru ca fiecare dintre noi detine date insuficiente."Profesorul a replicat:"Mai ganditi-va pana maine,doar sunteti buni la matematica!"A doua zi la intalnirea cu profesorul are loc discutia:"A-ti gasit numerele?"intreaba profesorul."Nu!"raspund elevii,dupa care Sandu adauga:"De altfel nu vad nici o metoda prin care colegul Petre ar putea determina suma mea!".In acest moment profesorul intervine:"I-ai dat lui Petre o informatie foarte pretioasa!Mai ganditi-va amandoi pana maine!"Dupa o ora Petre il suna la telefon pe Sandu si-i spune:"Profesorul a avut dreptate,am aflat numerele!"A doua zi ambii elevi au comunicat profesorului numerele respective;si Sandu reusise sa le gaseasca.Ca raspuns profesorul le spune:"Sunt sigur ca intre timp a-ti stat de vorba!Tu Petre i-ai spus lui Sandu ca ai gasit numerele?" "Da!"raspunde Petre."Dar cum a-ti aflat?"adauga el!"Gandeste-te singur !" raspunde profesorul.
Cunoscand aceasta scurta poveste puteti sa ne spuneti care erau numerele?Cum au judecat cei doi elevi!Cum a dedus profesorul ca elevii au vorbit intre ei?
dBSh
 
Mesaje: 10
Membru din: Joi Iul 16, 2009 11:11 am

Re: Petru & Sandu

Mesajde Intrebatorul » Dum Aug 09, 2009 4:01 pm

Intrebatorul
 
Mesaje: 48
Membru din: Sâm Iun 27, 2009 5:41 am

Re: Petru & Sandu

Mesajde aleph » Dum Aug 09, 2009 9:22 pm

aleph
 
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Membru din: Mar Iun 23, 2009 6:46 pm

Re: Petru & Sandu

Mesajde Intrebatorul » Lun Aug 10, 2009 3:52 am

Intrebatorul
 
Mesaje: 48
Membru din: Sâm Iun 27, 2009 5:41 am

Re: Petru & Sandu

Mesajde dBSh » Mie Aug 12, 2009 7:44 am

Daca si`ar fi comunicat unul altuia produsul respectiv suma .. chestia ar fi fost banala .. ganditi`va si la faptul ca Petru nu ar fi avut vum sa afle suma lui Sandu ... iar Sandu a gasit numerele doar dupa ce i`a zis Petru ca le`a gasit.. astea sunt indiciile.
dBSh
 
Mesaje: 10
Membru din: Joi Iul 16, 2009 11:11 am

Re: Petru & Sandu

Mesajde Intrebatorul » Joi Aug 13, 2009 11:51 am

Intrebatorul
 
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Membru din: Sâm Iun 27, 2009 5:41 am


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