Peter and John had a picnic.Peter ate half of the cakes.Then John ate half of the remaining cakes an

题目

Peter and John had a picnic.Peter ate half of the cakes.Then John ate half of the remaining cakes and three moor.There were no cakes left.How many cakes did they take to the picnic?

答案

Peter吃了一半,John吃了剩下的一半,即吃了四分之一,再吃三个就没有了,这三个就是最后剩下的四分之一,所以应该是带了12个蛋糕