John and Mary were each paid x dollars in advance to do a…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We are first given that John worked for 10 hours and that Mary worked for 2 hours less than John. So we can say: …
If n = 4p, where p is a prime number greater than 2…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This is an interesting question because we are immediately given the option to insert any prime number we wish for p. Since this is …
A store currently charges the same price for each towel…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can start by creating some variables. Q = quantity of towels sold P = price per towel sold Next we can set up …
In the rectangular coordinate system above, the line y = x…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem does contain a diagram that looks like the following: We are given that the line y = x is a perpendicular bisector …
If 75% of a class answers the first question on a certain test…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: For this overlapping sets problem we can use the following equation: Total percent = % in category A + % in category B – …
The ratio, by volume, of soap to alcohol to water in a…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: The first thing we want to do is set up the ratio of the original solution using variable multipliers. soap : alcohol : water …
0.99999999/1.0001 – 0.99999991/1.0003 =
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: When first looking at this problem, we must consider the fact that 0.99999999/1.0001 and 0.99999991/1.0003 are both pretty nasty-looking fractions. However, this is a …
A rectangular box is 10 inches wide, 10 inches long…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve this problem we must remember that given any rectangular solid, the longest line segment that can be drawn within the solid will …