Question

Aflati 3 nr impare consecutive cu suma 315

Answer 1

a,b,c-nr. cautate
a,b,c-nr. consecutive impare
b=a+1
c=a+2
a+b+c=315
_______
a,b,c=?
_______
a+a+2+a+4=315
3 a =309
a=309:3
a=103
b=103+2
b=105
c=103+4
c=107
....

Answer 2

l---------l  primul nr               }
l---------l-l+2 al doilea          }   315 suma
l---------l--l--l+2+2 al treilea }

1+1+1=3 segmente egale
315-2-2-2=309 ( 3 segmente egale)
309:3=103 primul nr
103+2=105 (al doilea)
103+2+2=107 (al treilea)