Tag: GMAT OG 2018

GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on the rule that when we express a perfect square by its unique prime factors, every prime factor’s exponent …

GMAT OFFICIAL GUIDE PS Solution: We can solve this problem in a similar manner to solving a work problem, and we can use a table to organize our information. …

GMAT OFFICIAL GUIDE PS Solution: Although this problem appears to be a general word problem it is actually testing us on our understanding of remainders when dividing integers. We …

GMAT OFFICIAL GUIDE PS Solution: We would never be asked to calculate 3^8 or 2^8, so we must approach this problem not as an arithmetic question but as an …

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. …

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 …

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 …

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 …