Which of the following equations is NOT equivalent to…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this question, we start by FOILing the right hand side of the given equation. 10y^2 = (x+2)(x-2) 10y^2 = x^2 – 4 …
If O is the center of the circle above, what fraction…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: In solving this problem there are three angle rules that we must consider. 1) A circle measures a total of 360 degrees. 2) A …
Root of (16*20+8*32)=…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: We must first simplify the expression in the square root **before **actually taking the square root. In other words, we have to get the …
How many minutes does it take John to type y words if he…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on our knowledge of variables in a “work” question. Ultimately, we are solving for time. Since rate x time …
The dots on the graph above indicate the weights and fuel…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: The easiest way to solve this problem is to actually count the dots on the graph that fit the given criteria. We must find …
A student’s average (arithmetic mean) test score on 4 tests…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we use the average equation: average = sum/quantity We don’t know the individual scores for each of the first 4 tests, but …
A rope 40 feet long is cut into two pieces…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this problem, we start by setting up two variables for the lengths of the long and short pieces of rope. L = …
The numbers of cars sold at a certain dealership on six of…
May 8, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we will use the number given in each Roman numeral to determine the average and median and determine whether they are equal. …