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Brian rented a book from the book shop.The shop charges $2 for the first day and $3 from the second day onwards.Brian took more then 2 days to return the book and he paid $35 while returning the book.How
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Mar 15, 2019
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Brian rented a book from the book shop.The shop charges $2 for the first day and $3 from the second day onwards.Brian took more then 2 days to return the book and he paid $35 while returning the book.How many days did he keep the book with him?
Mathematics
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Alfat Saputra Harun
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36=n(n-1)/2=35+1,because it begun from2
72=n(n-1)
n=8=days
1+2+3+...=n(n-1)/2
Rajasekar
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Mar 19, 2019
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