bookcase, arrange 10 books per shelf and no books left. If : DS Archive
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# bookcase, arrange 10 books per shelf and no books left. If

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bookcase, arrange 10 books per shelf and no books left. If [#permalink]

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18 Aug 2003, 12:52
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bookcase, arrange 10 books per shelf and no books left. If he acquired 10 additional books, and arrange 12 books per shelf, no books left. Ask how many books he has before acquiring the addition 10 books
A before acquiring, his books less than 96
B before acquiring, his books more than 24
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18 Aug 2003, 18:34
The number of shelves for which this is possible is 5.

So he had 50 books before and 60 books after. I am not sure how to interpret (a) and (b), since both seem to be independently validate the answer. So is (D) the answer?

Help !!!
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