How many minutes does it take John to type y words if he…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on our knowledge of variables in a “work” question. Ultimately, we are solving for time. Since rate x time …
Author: Jeff Miller
A student’s average (arithmetic mean) test score on 4 tests…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we use the average equation: average = sum/quantity We don’t know the individual scores for each of the first 4 tests, but …
The numbers of cars sold at a certain dealership on six of…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we will use the number given in each Roman numeral to determine the average and median and determine whether they are equal. …
A case contains c cartons. Each carton contains b boxes, and…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that a case contains c cartons. Each carton contains b boxes, and each box contains 100 paper clips. Thus we can …
For which of the following values of n is (100+n)/n NOT an…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is easiest solved by plugging in each answer choice. A) (100 + 1)/1 = 101/1 = 101 Answer choice A yields an …
In a certain sequence, the term xn is given by the formula
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: (Note that the * symbol in this solution indicates multiplication.) We are given that X(n) = 2 * X(n-1) – ½ * X(n-2), for …
The value of (2^(-14) + 2^(-15) + 2^(-16) + 2^(-17))/5 is…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by translating the question. We are asked (2^-14) + (2^-15) + (2^-16) + (2^-17) is how times the value of 2^-17. We …
Right triangle PQR is to be constructed in the xy-plane…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can start by drawing the triangle in the xy-plane. This will help us visualize how we are to solve the problem. As we …