a.I____I
b.I____I+2
c.I____I+2+2
d.I____I+2+2+2
e.I____I+2+2+2+2
f. I____I+2+2+2+2+2
Suma este 1170 . Aflam suma partilor egale .
1170-30=1140
1140:6=190 ( a )
190+2=192 ( b )
190+4=194 ( c )
190+6=196 ( d )
190+8=198 ( e )
190+10=200 ( f )
Verificare : 190+192+194+196+198+200=1170