Peter 11
Peter is answering to ten word math problems. It takes him 1 ⅓ hour to answer five and 1 ½ hours to answer 5. On average, how many minutes does it take him to answer a problem?
Correct answer:
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You need to know the following knowledge to solve this word math problem:
statisticsnumbersUnits of physical quantitiesGrade of the word problem
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