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there are 10 kids in a class. When they meet eachs says hi to the other and the answer "hi" follows. Before the class starts, how many times woul one hear the word "hi"?
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there are 10 kids in a class. When they meet eachs says hi to the other and the answer "hi" follows. Before the class starts, how many times woul one hear the word "hi"?

User Matus Dubrava
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Answer: I think it 100
Because each kids would say hi to each other
10x10=100
User Barthel
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