exam Maths Puzzle Numerical Ability

The surface area of a cube is 216 cm2. What is the length of an edge?

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exam Other Question

A certain kind of wood weighs 0.85 g per cubic cm. An 18cm by 12cm by 10cm block of that wood is floating in water. Approximately what weight of water does the block displace? x^7y^2-4x^5y^2-21x^3y^2