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Q15 if x 0 then x 1x 2 x 1x 2 a 1x b x c 1 d 2 e 4

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Q15: If x ≠ 0, then (x + 1/x) 2 - (x - 1/x) 2 = A. 1/x B. x C. 1 D. 2 E. 4 Answer: ---------------------------------------------------------------------------------------------------------------------- Q16: If m, p, and t are positive integers and m < p < t, is the product mpt an even integer? (1) t – p = p - m (2) t – m = 16 5
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---------------------------------------------------------------------------------------------------------------------- Q17: If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2 flips? ---------------------------------------------------------------------------------------------------------------------- Q18: The function f is defined by f(x) = √x – 10 for all positive numbers x. If u = f(t) for some positive numbers t and u. What is t in terms of u? A. √(u+10) B. (√u + 10) 2 C. √(u 2 +10) D. (u + 10) 2 E. (u 2 + 10) 2 Answer: ---------------------------------------------------------------------------------------------------------------------- Q19: y l 2 -3 0 x The graph of which of the following equations is a straight line that is parallel to line l in the figure above? 6
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---------------------------------------------------------------------------------------------------------------------- Q20: What is the total number of executives at Company P? (1) The number of male executives is 3/5 the number of female executives. (2) There are 4 more female executives than male executives. A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient. D. EACH statement ALONE is sufficient. E. Statements (1) and (2) TOGETHER are NOT sufficient. Answer: ---------------------------------------------------------------------------------------------------------------------- Q21: The ratio of the number of boys to the number of girls in a certain school club is 3 : 4. If there are 5 more girls than boys in the club, how many girls are in the club? ---------------------------------------------------------------------------------------------------------------------- Q22: B A 7
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What is the volume of the cube above? (1) The surface area of the cube is 600 square inches. (2) The length of diagonal AB is 10√3 inches. ----------------------------------------------------------------------------------------------------------------------
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