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21-02-2008, 11:52 PM
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#1 |
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Arcichitect
Join Date: Mar 2003
Location: Bucuresti
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Problema de matematica
Hai sa vedem cine de pe forum e destept
Problema la concursul de matematica, Kangaroo. O mamica e cu 21 de ani mai in varsta decat fiul ei. Peste 6 ani mamica o sa fie de 5 ori mai in varsta decat copilul. Intrebare: Unde este acum taticul? Cititi cu atentie cerinta
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22-02-2008, 05:41 AM
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Member
Join Date: Aug 2007
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In africa?
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22-02-2008, 08:36 AM
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#3 |
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I Don't Believe a Word
Join Date: Jan 2007
Location: Bucuresti/Constanta
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Raspuns : taticul este langa mamica.
Explicatie:copilul = a mama = b b= a + 21 peste 6 ani : copilul = a + 6 ; mama = b+6 ; si mai avem ca 5(a+6)=b+6 Il inlocuim pe b din prima ecuatie si iese asa: 5(a+6) = a + 21 + 6 => 5a + 30 = a +27 => 4a=-3 a= -3/4 ...asta inseamna minus 9 luni,deci copilul nu s-a nascut inca,deci e pe drum,deci taticul e undeva langa mamica.
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22-02-2008, 11:18 AM
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김정일
Join Date: Nov 2003
Location: North Korea
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Lol ce explicatie!
Raspuns: Creste copilu |
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22-02-2008, 12:33 PM
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simpatizant hibrid
Join Date: Apr 2004
Location: Bucureşti
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Răspunsul lui stephen e incomplet. Ca să fie clar, tăticul e undeva ĪN mămică.
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Căci cu noi este Dumnezeu... |
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22-02-2008, 12:34 PM
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Guest
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Quote:
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22-02-2008, 02:40 PM
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Tunar
Join Date: May 2006
Location: Urziceni
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Cert e că tăticul e īn al nouălea cer.
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I probably got a couple of screws up in my head loose. |
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22-02-2008, 02:52 PM
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Nick vechi: xdevil
Join Date: May 2005
Location: Deasupra ta
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Adica cum daca stii matematica esti destept? =))))))
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22-02-2008, 05:02 PM
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#9 |
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Student wanna' be...
Join Date: Dec 2006
Location: In the hood
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Adica da. Nu tine numai de matematica
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22-02-2008, 05:19 PM
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Arcichitect
Join Date: Mar 2003
Location: Bucuresti
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Quote:
Am considerat corect si raspunsul lui stephen pentru ca nu stiu exact cati ar fi zis "in mamica". Unde A=copilul si B=mamica A+21=B (A+6)*5=B+6 ------------- A=B-21 5A+30=B+6 ----------------- 5*(B-21)+30=B+6 ----------------- 5B-105+30=B+6 ---------------- 5B-B=6+105-30 --------------- 4B=81 ---------- B=20.25 A=20,25-21= -0,75 >>> 0,75=3/4 >>> copilul are 9 luni Copilul e inca in burta mamei Taticul e IN mamica.
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