The Ratio of the opened windows to the closed windows is 1:3.
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The Ratio of the shortest trees to the tallest trees is 1:2

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The Ratio of the pink magnet to the blue magnet is 2:1
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The Ratio of the white coloured papers to the yellow coloured papers is 4:1.
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The Ratio of the table with water bottles to the table without water bottles is 3:1.
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