Home Uncategorized Xiaoming’s big promotion is five yuan a bottle. Four bottle caps or two empty bottles can be exchanged for one bottle. Now there are twenty yuan. How much can I drink at most

Xiaoming’s big promotion is five yuan a bottle. Four bottle caps or two empty bottles can be exchanged for one bottle. Now there are twenty yuan. How much can I drink at most

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Xiaoming’s big promotion is five yuan a bottle. Four bottle caps or two empty bottles can be exchanged for one bottle. Now there are twenty yuan. How much can I drink at most

4 bottles for 1.20 yuan. After drinking, there are 4 empty bottles and 4 caps replace 3 bottles and 4 bottles with empty caps
replace 3.2 empty bottles with 1 bottle. After drinking, there are 2 empty bottles and 4 caps
4.2 empty bottles for 1 bottle and 4 caps for 1 bottle. After drinking, there are 2 empty bottles and 2 caps
replace 5.2 empty bottles with 1 bottle. After drinking, there will be 1 empty bottle and 3 caps
6. Borrow one bottle. After drinking, there are two empty bottles and four caps; Change 2 bottles, return 1 bottle, leave 1 bottle
7 Borrow 1 bottle, after drinking 2 bottles, there are 2 empty bottles and 2 caps; Replace one bottle and return it. There are still two caps left
8. Borrow 2 bottles. After drinking, there are 2 empty bottles and 4 caps; Replace 2 bottles and return them. There are no more bottles and caps left
therefore, there are: 4 + 3 + 1 + 2 + 1 + 2 + 1 + 2 = 16

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