Question

Mara, ioana si alexandru au impreuna 27 mere. Cate mere are fiecare, daca mara are de 4 ori mai multe ca ioana, iar alexandru mai multe ca ioana si mai putine ca mara.

Answer 1

m+i+a=27            |---|---|---|---|m
m=4xi                  |---|---|---|a
a>i                       |---|---|i
a<m
27:9=3(i)
m=4x3=12
27-15=12(a)

Answer 2

cate mere are ioana
27:9=3
cate mere are mara
4x3=12
cate mere are alexandru
27-12=15