exam Maths Puzzle Numerical Ability

can a number be rational and irrational at the same time?

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exam Other Question

A sum of $37,500 is invested, part of it at 11% annual interest and the remainder at 8% annual interest. If the yearly interest from the 11% investment is $303 less than twice the Grain worth 65 cents per pound was mixed with grain worth 90 cents per pound to produce 20 pounds of a mixture worth 80 cents per pound. Find how many pounds of each was used