A photography dealer ordered 60 Model X cameras…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that a dealer ordered 60 cameras to be sold for $250 each. This is a 20% markup over the initial cost …
If m > 0 and x is m percent of y, then…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve we want to first create a word translation from the information in the problem stem. We are given that x is m …
A fruit-salad mixture consists of apples, peaches, and grapes…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can first set up our ratio using variable multipliers. We are given that a fruit-salad mixture consists of apples, peaches, and grapes, in …
Of the 300 subjects who participated in an experiment using…
May 7, 2015
Of the 300 subjects who participated in an experiment using… Solution: This is a 3-circle Venn Diagram problem. Because we do not know the number of unique items in …
Last year the price per share of Stock X increased by k percent…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To start, we need to create a few variables. p = price per share of stock X e = earnings per share of stock …
The positive integer n is divisible by 25. If n^1/2 is…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can solve this problem by translating the given information into math equations. We are first given that the positive integer n is divisible …
How many prime numbers between 1 and 100…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by prime factoring 7,150. 7,150 = 715 x 10 = 143 x 5 x 10 At this point we must be careful. …
For any positive integer n, the sum of the first n positive integers…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: Although a formula is provided in this problem, we can easily solve it using a different formula: sum = (average)(quantity) Let’s first determine the …