2. 外语
  3. 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 h

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 h

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问题 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?
选项 A、7.5
B、30
C、46
D、62
答案D
解析 Jonny生日时，奶奶给了他一些零花钱,Jonny在5个商店将这些钱花完了。在每家商店花的钱都比进店时的一半还多1元。那么奶奶给了Jonny多少零花钱?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，可以得出第一次的钱是 62块。
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本试题收录于： C类竞赛（非英语专业本科）题库大学生英语竞赛（NECCS）分类
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C类竞赛（非英语专业本科）

大学生英语竞赛（NECCS）

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