exam Maths Puzzle Numerical Ability

divide: 12x^3y^2-6xy^2+9y^3
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X+3

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This involves a circular pool. When it rains, the water falls off the top rim of the pool, splashes onto the ground and causes a muddy ring to form on the bottom of the pool wall, a jet plane travelling at a constant speeed goes 1200 mi with the wind , then turns around and travel for 1000 mi against the wind . If the speed of the wind is constant 50mph , an