If a = -0.3, which of the following…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that a = -0.3; what we must keep in mind in this problem is that we are really being tested on …
Author: Jeff Miller
If s > 0 and (r/s)^1/2=s, what what is r in terms of s
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we need to simplify the equation √(r/s) = s. We first want to eliminate the square root, so we square both sides, …
For the positive integers a, b, and k, a^k||b means that a^k
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: This is called a “defined function” problem. The parallel lines mean intrinsically nothing, except to establish a relationship between a^k and b. We are …
What is the smallest integer n for which 25^n > 5^12 ?
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we want to get the bases the same. Thus we need to break 25^n into prime factors. 25^n = (5^2)^n = 5^(2n) …
If T = 5/9 * (K – 32), and if T = 290, then K =
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by substituting 290 for T and we obtain: 290 = 5/9(K – 32) To eliminate the fraction, we multiply the entire equation …
A store reported total sales of $385 million for February…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: The problem is testing us on using the percent change formula: (New Value – Old Value)/Old Value x 100 We are given: February sales …
In the rectangular solid above, the three sides shown…
May 20, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given a rectangular solid and also are given areas of three of the sides. Let’s draw the figure out. We label the …
Last Sunday a certain store sold copies of Newspaper A…
May 13, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that newspaper A sold for $1 and that newspaper B sold for $1.25. Next we are are given that that p …