Răspuns:
a=327
b=329
c=331
c=333
Explicație pas cu pas:
a;b;c;d => nr.consecutive impare
a+b+c+d=1320
b=a+2
c=b+2=> c=a+2+2 => c=a+4
d=c+2 => d=c+2 => d=a+6
a+a+2+a+4+a+6=1320
4a+12=1320
4a=1320-12
4a=1308
a=1308:4
a=327
b=327+2 => b=329
c=327+4 => c=331
d=327+6 => d=333
327+329+331+333=
=656+664=
=1320
