A farmer was getting a bit older , so he decided with his three sons how they were supposed to devide the cattle among the three of them .
Look ,he said , my oldest Matthew gets 1/2 of the cattle .
Jo , my second gets 1/4 ; and young Jimmy gets 1/5 !!

A few days later , the father was feeling really sick and wanted to get it all in order . He told his sons to do it as quick as possible !

Two days later , the three man came to their fathers bed and said : Dad , we just cannot do what you ask !!! As you know , we have 19 cows . Now how are we supposed to devide those ????
It is impossible to take 1/2 , 1/4 , nor 1/5 from 19 ...........

Oh you stupid sons , I thought you knew better !!
Okay , I will help you : go and ask farmer Rogers if we can borrow one of his cows just for an hour !!!

okay , that's what they did !
So , how many cows do we have now , said the old farmer ??
20 DAD !!!!!!!!!!!!!!

well ,Matthew gets 1/2 of 20 , so that is 10 cows .
Jo gets 1/4 of 20 , so that is 5 cows .
Jimmy gets 1/5 of 20 , so that is 4 cows !!

10 + 5 + 4 = 19 cows right !!???

okay then !!! now take that cow from next door back to his owner !!!!! I can die in peace now !!