If the median of the numbers in list I above is equal to the…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by calculating the median of the numbers of list I: 3, 6, 8, 19. We see that the numbers in the list …
Author: Jeff Miller
Which of the following is equivalent to the pair of…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: Let’s isolate x in both inequalities, starting with x + 6 > 10. x + 6 > 10 x > 4 Next we isolate …
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 …
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 …