Question

Daca 4 gaini fac 16 oua in 12 zile,cate oua fac 6 gaini in 9 zile?

Answer 1

oua gaini...d.p  (creste nr gainilor, crste nr oualelor)

oua zile, d.p. (scade nr zilelor, scade nr oualelor)

numarul gainilor crestede 6/4=3/2ori

numarul zilelor scade de 12/9=4/3 ori

deci in total numarul oualelor scade de (4/3) *(3/2) =2 ori

16:2=8 oua

altfel

ogaina face 4*16/12=64/12  oua pe zi

atunci 6 gaini in  vor face x oua in 9zile deci 6x/9 oua

dar rapoartele sunt egale

64/12=6x/9

16/3=2x/3

16=2x

x=8 oua