Two Variate Word Problems

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Carnegie Mellon University *

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103

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Mathematics

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Jan 9, 2024

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Two-Variable Word Problems For questions in the Quantitative Comparison format (“Quantity A” and “Quantity B” given), the answer choices are always as follows: (A) Quantity A is greater. (B) Quantity B is greater. (C) The two quantities are equal. (D) The relationship cannot be determined from the information given. Where answer choices do not appear on Quantitative Comparison questions in this book, you should choose A, B, C or D based on the above. For questions followed by a numeric entry box | l, you are to enter your own answer in the box. For questions followed by a fraction-style numeric entry box , you are to enter your answer in the form of a fraction. You are not required to reduce fractions. For example, if the answer is —, you may enter or any equivalent fraction. All numbers used are real numbers. All figures are assumed to lie in a plane unless otherwise indicated. Geometric figures are not necessarily drawn to scale. You should assume, however, that lines that appear to be straight are actually straight, points on a line are in the order shown, and all geometric objects are in the relative positions shown. Coordinate systems, such as xy-planes and number lines, as well as graphical data presentations, such as bar charts, circle graphs, and line graphs, are drawn to scale. A symbol that appears more than once in a question has the same meaning throughout the question. 1. Two parking lots can hold a total of 115 cars. The Green lot can hold 35 fewer cars than the Red lot. How many cars can the Red lot hold? (A) 35 (B) 40 (C) 70 (D) 75 (E) 80
2. Three friends ate 14 slices of pizza. If two of the friends ate the same number of slices, and the third ate 2 more slices than each of the other two, how many slices were eaten by the third friend? (A) 3 (B) 4 5 (D) 6 (E) 7 In 8 years, Polly’s age, which is currently p, will be twice Quan’s age, which is currently g. Quantity A Quantity B 3. p—38 2q 4. Pens cost 70 cents each and pencils cost 40 cents each. If Iris spent $5.20 on a total of 10 pens and pencils, how many pencils did she purchase? ($1 =100 cents) A) 4 B) 6 ) 8 (D) 10 (E) 13 5. Jack downloaded 10 songs and 2 books for $48, Jill downloaded 15 songs and 1 book for $44. How much did Jack spend on books, if all songs are the same price and all books are the same price? (A) $14 (B) $20 (C) $28 (D) $29 (E) $30
6. Marisa has $40 more than Ben, and Ben has one-third as much money as Marisa. How many dollars does Ben have? sl | 7. Norman is 12 years older than Michael. In 6 years, he will be twice as old as Michael. How old is Michael now? (A) 3 B) 6 C) 12 (D) 18 (E) 24 8. Krunchy Kustard sells only two kinds of doughnuts: glazed and cream- filled. A glazed doughnut has 200 calories, and a cream-filled doughnut has 360 calories. If Felipe ate 5 doughnuts totaling 1,640 calories, how many were glazed? (A) 1 B) 2 ©) 3 (D) 4 (E) 5 9. The “aspect ratio” of a computer monitor is the ratio of the monitor’s width to its height. If a particular monitor has an aspect ratio of 16 : 9, and a perimeter of 100 inches, how many inches wide is the monitor? (A) 18 (B) 25 C) 32 (D) 36 (E) 64
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