exam Maths Puzzle Numerical Ability

Simplify
(2x^-6y^-4z^0/3^-2x^-2y^-8z^5)^3

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exam Other Question

Rita rode her bicycle out into the country at a speed of 20 mph and returned along the same route at 15 mph. If the round trip took 5 hours and 50 minutes, how far out did she ride? The length of a rectangular playing field is 5ft less than twice its width.If the perimeter of the playing field is 230ft find the length and width of the field.