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A mother is 3 times as old as her daughter. In 12 years time she will be twice as old as her daughter will be then. How old is the mother now?
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An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?
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A mother is 3 times as old as her daughter. In 12 years time she will be twice as old as her daughte...
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