In a certain sequence, the term xn is given by the formula
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: (Note that the * symbol in this solution indicates multiplication.) We are given that X(n) = 2 * X(n-1) – ½ * X(n-2), for …
It would take one machine 4 hours to complete a large production order…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can classify this problem as a “combined worker” problem. To solve this type of problem we should use the formula: Work (done by …
The value of (2^(-14) + 2^(-15) + 2^(-16) + 2^(-17))/5 is…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by translating the question. We are asked (2^-14) + (2^-15) + (2^-16) + (2^-17) is how times the value of 2^-17. We …
How many of the integers that satisfy the inequality…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: Before diving into this problem we want to first analyze the given inequality: (x+2)(x+3)/(x-2) ≥ 0 This means that (x+2)(x+3) divided by x-2 is …
Right triangle PQR is to be constructed in the xy-plane…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We can start by drawing the triangle in the xy-plane. This will help us visualize how we are to solve the problem. As we …
If [(0.0015)(10^m)]/[(0.03)(10^k)] = 5(10^7)…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by simplifying the numerator and denominator of the given fraction. First, we simplify the numerator: (0.0015)(10^m) It will be helpful to convert …
A straight pipe 1 yard in length was marked off in fourths…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is best solved by setting up a diagram to represent the markings. We are given that we are marking the pipe into …
Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight…
May 7, 2015
GMAT OFFICIAL GUIDE PS Solution: This is a great problem because we can solve it using equations and substitution, or we can employ some estimation because the equation we …