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Re: A rectangular board measuring 9 inches by 11 inches is to be covered w [#permalink]
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The smallest number of tiles will be obtained by using as many \(2\) inch by \(3\) inch rectangular tiles as possible since they are the larger tiles. As shown in the diagram above, \(16\) such tiles can be placed on the board, leaving three square inches to be covered with \(1\)-inch square tiles. The total number of tiles used is \(16 + 3 = 19.\)

Therefore, A is the answer.
Answer: A
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Re: A rectangular board measuring 9 inches by 11 inches is to be covered w [#permalink]
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Re: A rectangular board measuring 9 inches by 11 inches is to be covered w [#permalink]
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