exam Maths Puzzle Numerical Ability

if density of gold is 19.3g/mL and the density of silver is 10.5g/mL devise and experiment to determine the metal in each object

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exam Other Question

Using only 5's and any combination of the four operations (+ - x division) write a mathematical expression that results in each of the folllowing quantities: 0,2,3,4,5. Be sure to V=s^3
500=s^3
Need to know how to solve for volume when only volume is given. Need step by step instructions. Thanks.