A tank contains 10,000 gallons of a solution that is 5 percent…
May 7, 2015
GMAT OFFICIAL GUIDE PS – Solution: We start with 10,000 gallons of a solution that is 5% sodium chloride by volume. This means that there are 0.05 x 10,000 …
If d=1/(2^3*5^7) is expressed as a terminating decimal, how…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: Since actually dividing 1/(2^3*5^7) would be time consuming, we want to manipulate d so that we are working with a cleaner denominator. The easiest …
A positive number x is multiplied by 2, and this product…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We need to produce an equation from the information given in the problem stem. We are first given that x is multiplied by 2 …
An empty pool being filled with water at a constant rate…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve we can setup a proportion. The proportion will read: A time of 8 hours is to filling up 3/5 of the pool …
Jack is now 14 years older than Bill. If in 10 years Jack…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We first want to create variables for Jack’s age today and Bill’s age today. J = Jack’s age today B = Bill’s age today …
A border of uniform width is placed around a rectangular photograph…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this problem it’s easier to refer to a diagram of what is provided in the problem stem. In creating the diagram we …
The shaded portion of the rectangular lot shown above represents…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: In solving this problem we first must recognize that the flower bed is the right triangle with sides of y yards, x yards, and …
If n = (33)^43 + (43)^33 what is the units digit of n…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This is a units digit pattern question. The first thing to recognize is that in units digit pattern questions we only care about the …