Author: Jeff Miller

Machine A produces bolts at a uniform rate… Solution: We are given that machine A produces bolts at a uniform rate of 120 every 40 seconds. Thus, the rate …

GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on symmetric distributions. In any symmetric distribution with mean m and standard deviation d, 50% of the data values …

GMAT OFFICIAL GUIDE PS Solution: In solving this problem we must remember that we are given a rate in miles per gallon. It follows that: Rate = Distance/Gallons We …

GMAT OFFICIAL GUIDE PS Solution: We can solve this problem by first creating equations for the given information. We know that the rate is x cents for the first …

Solution: We can use some actual numbers to solve this problem. We see that p/q is less than 1. It follows that we have a proper fraction, where q …

GMAT OFFICIAL GUIDE PS Solution: Let’s use a convenient value for the total number of people in town X. Since this is a percent problem, 100 is an easy …

GMAT OFFICIAL GUIDE PS Solution: Let’s use the answer choices to help us solve this problem. We are looking for the minimum number of letters that can be used. …

GMAT OFFICIAL GUIDE PS Solution: The defining factor of an arithmetic sequence is that there is a constant difference d between each successive pair of terms. We are given …