The diameters of two circles are the side of a square and the diagonal of the square. The ratio of the areas of the smaller circle and the larger circle is :
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Six years ago, Hena was 1/4th of the age she will be after 12 years from now. How old is she now?

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Karim has 40% more stamps than Rahim, if he gives 45 of his stamps to Rahim, then Rahim will have 10% more stamps than Karim. How many stamps did karim begin with?

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In a mixture, the ratio of the milk and water is 6 : 5. when 22 liter mixture is replaced by water, the ratio becomes 9 : 13. Find the quantity of water after replacement.

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In a class of 60, 32 studied English, 28 studied Bengali and 6 did not study either. How many of the students studied both?

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