Author: Scott Woodbury-Stewart

GMAT OFFICIAL GUIDE DS Solution: We are given that Tom, Jane, and Sue each purchased a new house. We are also given that the average (arithmetic mean) price of …

GMAT OFFICIAL GUIDE DS Solution: We are given that x, y, and z are positive integers, and we need to determine whether x – y is odd. We must …

GMAT OFFICIAL GUIDE DS Solution: We need to determine the value of (2t + t – x)/(t – x). Using the distributive property we can rewrite this expression as: …

GMAT OFFICIAL GUIDE DS Solution: We are given that n is a positive integer and need to determine whether (1/10)^n < 0.01.  We can convert 0.01 to a fraction …

GMAT OFFICIAL GUIDE DS Solution: We need to determine the circumference of the circle provided. Let’s sketch the diagram below. We see from our diagram that we have a …

GMAT OFFICIAL GUIDE DS Solution: We are given that every member of a club contributes evenly to a $60 gift certificate. We must determine the number of members in …

GMAT OFFICIAL GUIDE DS Solution: We are given that the inflation for the year 1989 relative to the year 1970 was 3.56, which means the price of an item …

GMAT OFFICIAL GUIDE DS Solution: We are given that if Carmen had 12 more tapes she would have twice as many tapes as Rafael. If we let C = …