An operation @ is defined by the equation a@b = (a – b) / (a…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that operation Ө is defined by aӨb = (a-b)/(a+b). We are also given that aӨc = 0; thus, according to the …
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 …
David has d books, which is 3 times as many as Jeff…
May 21, 2015
GMAT OFFICIAL GUIDE PS – Solution: Although we could plug in a real value for d, the problem can be just as easily solved by setting up equations. So …
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 …
The ratio of the length to the width of a rectangular advertising…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: Let’s first set up our ratio using variable multipliers. length : width = 3.3x : 2x We are given that the width is 8 …
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 …