If x and y are positive, is x < y?
April 28, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that x and y are positive and we must determine whether x < 10 < y. Statement One Alone: x < …
Tag: GMAT OG 2018
If a < x < b and c < y < d, is x < y
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given that a < x < b, and that c < y < d. We must determine whether x < y. Statement …
How many people are directors of both Company…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We must determine how many individuals are directors for both Company K and Company R. To solve this “overlapping sets” problem, we can employ …
In a random sample of 80 adults, how many are college…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine the number of college graduates in a sample of 80 adults. Because some of the 80 adults are college graduates, …
Can a certain rectangular sheet of glass be positioned…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether a rectangular sheet of glass can cover an entire rectangular tabletop. We are given that the edges must be …
Is 4^(x + y) = 8^(10) ? (1) x – y = 9 (2) y/x = 1/4
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We need to determine whether 4^(x+y) = 8^10. We start by breaking down our two bases into prime factors. 4^(x+y) = (2^2)^(x+y) = 2^(2x+2y) …
Terry holds 12 cards, each of which is red, white, green, or blue. If…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are given that Terry has 12 total cards. The cards are colored red, white, green, or blue. We need to determine whether the …
A scientist recorded the number of eggs in each of 10 birds…
October 31, 2015
GMAT OFFICIAL GUIDE DS Solution: We are asked to determine the standard deviation of the number of eggs in 10 nests. Statement One Alone: The average (arithmetic mean) number …