A pharmaceutical company received $3 million in royalties…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: This is a percent decrease problem. We will use the formula: percent change = (new – old)/old x 100 to calculate the final answer. …
In Country C, the unemployment rate among construction…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given two pieces of information that can be translated into equations. However, before we make those equations let’s set up some variables …
In a certain district, the ratio of the number of registered republicans…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: The fractional ratio indicates that for every 3 Republicans, there are 5 Democrats, a ratio of 3 : 5. We first set up this …
If t = 1/(2⁹×5³) is expressed as a terminating decimal…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: We use the term “leading zeros” to describe the zeros between the decimal point and the first nonzero decimal digit. To complete this problem …
Each year for 4 years, a farmer increased the number of trees…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on exponential growth. The easiest way to navigate this problem is to set up a growth chart. We are …
Sixty percent of the members of a study group are women…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: This is a two-part probability question. We should first notice that since our answer choices are in decimal form, we can use a real …
The present ratio of students to teachers at a certain school…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that the ratio of students to teacher is 30 to 1. We can rewrite this using variable multipliers. students : teachers …
If a square mirror has a 20-inch diagonal, what is the…
May 6, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that a square has a 20-inch diagonal, and we must solve for the perimeter of the square. This means we first …