Last year, for every 100 million vehicles that traveled…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve we will set up a proportion. We know that “100 million vehicles is to 96 accidents as 3 billion vehicles is to …
Tag: Official Guide for GMAT Review 2016
If m⁻¹ = -⅓…
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: Since we know that m^-1 = -1/3 and m^-2 = (m^-1)^2, then m^-2 = (-1/3)^2 = 1/9. Answer: D
If (4 – x)/(2 + x) = x, what is the value of x^2 + 3x -4
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by simplifying the given equation, (4-x)/(2+x) = x. We first multiply both sides by 2+x. Thus we have: 4 – x = …
If the operation @ is defined by x@y=(xy)^1/2 for all …
May 21, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that the operation ⊙ is defined by x⊙y = √(xy) for all positive numbers. We are next given that (5⊙45)⊙60. Following …
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 …