Author: Jeff Miller

GMAT OFFICIAL GUIDE DS Solution: We need to determine the number of people in the line who are behind Beth, given that Beth is standing behind Adam and the …

GMAT OFFICIAL GUIDE DS Solution: We need to determine whether the area of the triangular region is less than 20. Statement One Alone: x^2 + y^2 ≠ z^2 Because …

GMAT OFFICIAL GUIDE DS Solution: We are given the ratio: blue : yellow : red = 2x : 3x : x We need to determine if there is enough …

GMAT OFFICIAL GUIDE PS The figure shown above consists of a shaded 9-sided polygon and 9 unshaded isosceles triangles… Solution: Since we have a 9-sided polygon (also known as …

GMAT OFFICIAL GUIDE PS Solution: We need to determine the number of ways to lineup male, female, male, female, male, female. Since there are 3 males, we have 3 …

GMAT OFFICIAL GUIDE PS Solution: Since the order of the books in her list matters, we use permutation. Thus, the number of ways 4 books can be chosen and …

GMAT OFFICIAL GUIDE PS Solution: We are given two decimals: 0.1X and 0.02Y To make 0.1X the greatest, we can let X = 9 and we have: 0.19 To …

GMAT OFFICIAL GUIDE PS Solution: Let’s test each answer choice: A) From Day 1 to Day 2 |(12 – 20)/20| x 100 = |-8/20| x 100 = 40% B) …