Students Arn,Bob,Cyd,Dan,Eve,and Fon are arranged in that order in a circle.They start counting：Arn first,then Bob,and so forth.When the number contains a 7 as a digit（such as 47）or is a multiple of 7 that person leaves the circle and the counting continues.Who is the last one present in the circle？（　?。?br />學(xué)生Arn、Bob、Cyd、Dan、Eve和Fon按照這個(gè)順序排成一個(gè)圈。他們開(kāi)始數(shù)數(shù)：首先是Arn,然后是Bob,依此類推。當(dāng)數(shù)字中含有7這個(gè)數(shù)字（例如47）或是7的倍數(shù)時(shí)，那個(gè)人就離開(kāi)這個(gè)圈子，計(jì)數(shù)繼續(xù)。誰(shuí)是圈內(nèi)的最后一個(gè)人？（　?。?/h1>