Question

Grandpa：You give me three empty bottles and I’ll give you a bottle of orange Juice．

Dad：I give you twenty-one bottles of orange juice, Tom．

Tom：I drink all these bottles of orange juice, and give the bottles to Grandpa．

Then grandpa gives me some bottles of orange juice．How many bottles of orange ju

ice do I drink in all(总共)?

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Answer 1

答案：31