book Maths Puzzle Numerical Ability

find the product (x+3/8)(x-3/8)

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book Other Question

Jane and Fred live 4 miles apart. Jane travels at a rate of 2mi/h and Fred at a rate of 3 mi/h. How long will it be before they meet? The volume of a cube is given by V = s^3. Find the length of a side of a cube if the Volume is 729 cm^3.