Răspuns :
ma=(a+b+c+d):4=49,62 suma lor=49,62*4=198,48 c+d=198,48-23,14=175,34 d=175,34-9,39=165,95
(a+b+c+d):4=49,62=>a+b+c+d=198,48
Daca a+b=23,14=>c+d=198,48-23,14=175,34
Cum al treilea nr adica "c" este 9,39=> 9,39+d=175,34=>d=165,95
Daca a+b=23,14=>c+d=198,48-23,14=175,34
Cum al treilea nr adica "c" este 9,39=> 9,39+d=175,34=>d=165,95