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Mathematics, 22.02.2021 08:30 natashawetzel5961

A student reads a book in 7 days, and his younger sister reads the same book in 9 days. Who will read more: the brother in 5 days or the sister in 6 days?

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A student reads a book in 7 days, and his younger sister reads the same book in 9 days. Who will rea...
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