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题目： A shirt goes on sale for 80% of its original price. One week later, the sale price is marked down 10%. The final price is what percent of the original price?

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题目： If, 5 years ago, Jamie was half as old as he is now, how old will he be in x years?

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题目： Points A (-2, 3) and B (1, 7) lie on the coordinate plane. What is the length of line segment AB?

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题目： The sum of the mean, the median, and the range of the set {1, 2, 6} equals which one of the following values?

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题目： How many integers are there between 51 and 107, inclusive?

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题目： Let Set T = {2, 4, 5, 7}. Which of the following values, if added to Set T, would most increase the standard deviation of Set T?

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题目： If $$8^{x} = 2^{12}$$, what is x?

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题目： If$$ [[x]] = x^{2} + 2x + 4$$, what is the value of [[3]]?

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题目： If x + y = 7 and x – y = 3, then $$x^{2} - y^{2} =$$

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题目： $${1}\over{{3}+\frac{4}{7}}$$=

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题目： If $$4^{x} + 4^{-x} = 2$$, which of the following is the value of x?

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题目： In the right triangle pictured to the right, what is the value of x?

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题目： A certain square has sides of length x. If the length of each side is doubled, then which of the following represents the area of the resulting square, in terms of x?

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题目： Which of the following has a value greater than 1?

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题目： In the rectangular coordinate plane points X and Z lie on the same line through the origin and points W and Y lie on the same line through the origin. If$$ a^{2} + b^{2} = c^{2} + d^{2} and e^{2} + f^{2} = g^{2} + h^{2}$$, what is the value of length XZ – length WY?