[2/3multiplied by5/2]+[2/3multiplied by6/7]
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47/ 21 is answer
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suyoggawade2:
what will be the unit digit of the square of 423
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An oxygen concentrator is a device that concentrates the oxygen from a gas supply by selectively removing nitrogen to supply an oxygen-enriched gas stream. Two methods in common use are pressure swing adsorption and membrane gas separation.
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