If Pat saved $600 of his earnings last month, how much did…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given that Pat saved $600 worth of his earnings, and we need to determine how much he earned last month. Statement One …
A citrus fruit grower receives $15 for each crate…
October 29, 2015
GMAT OFFICIAL GUIDE DS We are given that a citrus grower receives $15 for each crate of oranges shipped and $18 for each crate of grapefruit shipped. We can …
For which type of investment, J or K, is the annual rate of…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine which investment, J or K, provides a greater annual rate of return. That is, we are being asked whether J’s …
Data Sufficiency question about determining if n + 1 is odd
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether n + 1 is odd. Remember, if n is even, then n + 1 will be odd, and if …
A certain expressway has Exits J, K, L and M…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: Let’s first put the given information into a diagram. We can also define variables for the distances between J and K, K and L, …
In College X the number of students enrolled in both a…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: An easy way to solve this problem is to set up a double set matrix. In our matrix, we have two main categories: biology …
If the two floors in a certain building are 9 feet apart, how many…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: Let’s sketch a diagram of the stairs. Keep in mind that we don’t know the number of stairs between the floors, but the problem …
In a certain class, one student is to be selected…
October 29, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine the probability that a boy will be selected to read, in a class of boys and girls. Statement One Alone: …