GRE Exam Numerical Ability Arithmetic

The maximum recommended pulse rate R, when exercising, for a person who is x years of age is given by the equation R= 176 - 0.8x. What is the age, in years, of a person whose maximum recommended pulse rate when exercising is 140 ? (A) 40 (B) 45 (C) 50 (D) 55 (E) 60

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Correct Answer is Option (B)

R = 176 - 0.8x
140 = 176 - 0.8x
0.8x = 36
x = 45
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GRE Other Question

A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour? (A) 70 (B) 98 (C) 126 (D) 168 (E) 182 There are five sales agents in a certain real estate office. One month Andy sold twice as many properties as Ellen, Bob sold 3 more than Ellen, Cary sold twice as many as Bob, and Dora sold as many as Bob and Ellen together. Who sold the most properties that month?