Which of the following expressions can be written as an integer
May 9, 2016
GMAT Official Guide Solution: Let’s simplify the expressions in each Roman numeral to see which of them must be an integer. I. (√82 + √82)^2 (2√82)^2 4 x 82 …
At the start of an experiment, a certain population consisted of 3 animals…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are starting with 3 animals, and at the end of each month that number of animals doubles in size. Thus, we can say: …
Of the land owned by a farmer, 90 percent was…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We can start by letting T = the total land owned by the farmer. Since 90% was cleared for farming we can say: 0.9T …
The smaller rectangle in the figure above…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given a diagram, which represents a parking lot, with a smaller rectangle inside a larger rectangle. The dimensions of the smaller rectangle …
The graph of the equation xy = k, where…
May 9, 2016
GMAT OFFICIAL GUIDE P Solution: We are given the equation xy = k, where k is negative. It follows that x and y must have opposite signs. That is, …
The dial shown above is divided into equal-sized intervals. At which…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We are given a diagram with 8 intervals of equal length. Let’s start by sketching the diagram. Notice we also assigned a number to …
The positive two-digit integers x and y have the…
May 9, 2016
GMAT OFFICIAL GUIDE PS Solution: We can solve this question using the natural relationships that all two-digit numbers have. As an example, we can express 37 as (10 x …
In the figure above, what is the ratio of the measure of…
May 9, 2016
GMAT OFFICIAL GUIDE PS GMAT OG Solution: We are given a right triangle with the following angle measurements: angle A = (y + 10)° angle B = y° angle …