A+b+c=972
/..... /.. /.. /2
/..... /.. /.. /.. /.. /4
/...../../../../../../../6 ( 972)
Egalizam segmentele
972-(2+4+6)=972-12=960
Aflam cat reprezinta un segment
960:3=320
Aflam numerele
320+2=322
320+4=324
320+6=326
Verificare
322+324+326=972
646+326=972
972=972
Răspuns :324