Working simultaneously at their respective constant rates, Machines…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: We have a combined worker problem. In such problems we use the equation: Work (1 machine) + Work (2 machine) = Total Work. We …
Tag: Official Guide for GMAT Review 2016
In the coordinate plane, a circle has center (2, – 3) and passes
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: The area of a circle is A = πr^2. If we can find the radius, then we can find the area of the circle. Recall …
In a certain sequence of 8 numbers, each number after the first…
May 17, 2016
GMAT OFFICIAL GUIDE PS Solution: Since each number in the 8-number sequence after the first is 1 more than the previous number and the first number is -5, the sequence …
In the figure above, PQR and STU are identical equilateral triangles…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given a diagram with triangles PQR and STU. We are also given that PQR and STU are identical equilateral triangles, and PQ …
In the xy-plane, the straight-line graphs of the three equations above…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We can begin by substituting p and r in for x and y, respectively, in the 3 given equations. 1) r = ap – …
A certain list consists of 3 different numbers. Does the median…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that a certain list contains three different numbers. Let’s label these three numbers. a = smallest number b = middle number …
In planning for a trip, Joan estimated both the distance of the trip
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that Joan accurately divided her estimated distance by her estimated average speed to obtain an estimate for the time, in hours, …
For any positive integer x, the 2-height of x is defined to be the…
May 16, 2016
GMAT OFFICIAL GUIDE DS Solution: We are given that for any positive integer x, the 2-height of x is defined to be the greatest nonnegative integer n such that …