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Maths Puzzle
Numerical Ability
4! x 6!
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exam Other Question
9x^2-16y^2 over xy over 3 over y -4 over x
Anne and Nancy use a metal alloy that is 24.9% copper to make jewelry. How many ounces of a 20% alloy must be mixed with a 27% alloy to form 100 ounces of the desired alloy?