How much money did he get from grandma?智力题 2017-04-09 英语智力题 ℃ 网络整理
Grandma sent Johnny some money for his birthday. Johnny spent all of it in five stores. In each store, he spent $1.00 more than half of what he had when he came in. How much money did he get from grandma?
$7.50 - $25 - $30 - $46 - $62
答案：$62。做这道题时，解题要点就是----Johnny最后一次花的钱就是他身上所剩的钱，假设他最后一次剩余X块钱。那么我们可以列出方程式：X/2 + 1 = X，这样就能解出X=2，依次往前类推，可以得出第一次的前是62块。