exam Maths Puzzle Numerical Ability

Martha can rake the leaves in her yard in 8 hours. Her brother can do the job in 6 hours. How long will it take them to do the job working together?Mar

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exam Other Question

A dairy has 50 Gallons of milk that is 7.8 % butterfat. how much skim milk (no butterfat) should be mixed with it to make milk that is 2% butterfat? If 3 balls are drawn from a bag containing 3 red and 4 blue balls, what is the expected number of red balls in the sample?