exam Maths Puzzle Numerical Ability

IQ scores have a normal distribution with a mean of 100 and a standard deviation of 15. What two IQs separate the middle 95 percent from the remainder of the distribution?

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Reduce

(18x^2 + 33x - 30)/(4x^2 - 25)
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3x^2 + 7x - 6 27. Geometry. Floor plans for a building have the four corners of a room located at the points (2, 3), (11, 6), (-3, 18), and (8, 21). Determine whether the side through the points