De obicei numerele impare le scrii sub forma: 2k+1
Notam :
n1 ( primul numar)= 2k+1
n2=2k+3
n3= 2k+5
n4= 2k+7
n1+n2+n3+n4= (2k+1) + (2k+3) + (2k+5) + (2k+7)=
=8k + 16
8k+16= 1320
8k= 1304
k=163
Astfel:
n1= 2*163+1= 326+1= 327
n1=327
n2=329
n3=331
n4=333 ^_^
