book Maths Puzzle Numerical Ability

This is the problem: Jane has 132 more marbles than Mary has. If their mother gives 25 marbles to each of them, Jane will have 5 times as many marbles as Mary. How

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how many pints of a 40% salt solution must be added to 12 pints of 20% salt solution to end up with a 32% salt solution I am currently reviewing for a placement test and have not taken any math courses in nearly 3 years. I know that I have learned to do all of the topics included in the sample prob