Bibani |___|; carasi |___|+7; oletii |___|+7+8; rosioarele |___|+7+8+9. 70-(7+7+7+8+8+9)=70-46=24. Ar avea 24 pesti dacã ar fi prins doar cãt bibani,din fiecare. Acum,avem 4 segmente,asa cã 24:4=6. Deci pescarul a prins 6 bibani. Carasi a prins 6+7=13. Oblete a prins13+8=21. Rosioara a prins 21+9=30. Verificare 6+13+21+30=70.