MATH.13

Hours that the members of the task force spent

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hours that the members of the task force spent working on project P yesterday? A. 2 B. 3 C. 4 D. 5 E. 6 Answer: ------------------------------------------------------------------------------------------------------------ Q20: A certain list consists of 21 different numbers. If n is in the list and n is 4 times the average (arithmetic mean) of the other 20 numbers in the list, then n is what fraction of the sum of the 21 numbers in the list? 1 1 1 4 5 7

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------------------------------------------------------------------------------------------------------------ Q21: Three printing presses, R , S , and T , working together at their respective constant rates, can do a certain printing job in 4 hours. S and T , working together at their respective constant rates, can do the same job in 5 hours. How many hours would it take R , working alone at its constant rate, to do the same job? ------------------------------------------------------------------------------------------------------------ Q22: When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 3 times, what is the probability that it will land on the same side each time? 1 1 1 3 1 ------------------------------------------------------------------------------------------------------------ Q23: In the decimal representation of x , where 0 < x < 1, is the tenths digit if x nonzero? (1) 16 x is an integer. (2) 8 x is an integer. 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: ------------------------------------------------------------------------------------------------------------ Q24: 8
In a certain English class, 4 1 of the number of girls is equal to 6 1 of the total number of students. What is the ratio of the number of boys to the number of girls in the class? ------------------------------------------------------------------------------------------------------------ Q25: In the xy -plane, the vertices of a triangle have coordinates (0, 0), (3, 3), and (7, 0). What is the perimeter of the triangle? ------------------------------------------------------------------------------------------------------------ Q26: If 5 + n = 5, what is the value of n ? (1) n 2 is not equal to 0. (2) n 2 + 10 n = 0 ------------------------------------------------------------------------------------------------------------ Q27: A store’s selling price of \$2,240 for a certain computer would yield a profit of 40 percent of the store’s cost for the computer. What selling price would yield a profit of 50 percent of the computer’s cost? A. \$2,400 B. \$2,464 C. \$2,650 D. \$2,732 E. \$2,800 9

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• Spring '12
• Krugers
• Equals sign, Jill, car sales

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