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Maths Puzzle
Numerical Ability
From a point on a river, two boats are driven in opposite directions, one at 5 mph and the other at 13 mph. In how many hours will they be 90 miles apart?
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david`s father is two year old than his mother and his mother`s age is the square of his age. They years adds up to 80 years.How old is each one of them?
Find y if the line containing (3,-8) + (7,y) has a slope of -4.