Author: Jeff Miller

GMAT OFFICIAL GUIDE PS Solution: The original average salary is 3,250/5 = 650. If each of the 5 salaries will increase by 10%, the new sum of the salaries …

GMAT OFFICIAL GUIDE PS Solution: Since the sphere is inscribed in the cube, the length of an edge of the cube = the diameter of the sphere. Recall that …

GMAT OFFICIAL GUIDE PS Solution: Recall that a quotient is the result of a division problem. We can create the following equation in which x = the number we’re …

GMAT OFFICIAL GUIDE PS Solution: Since AC = 2 and DC = 1, AD must be 1. Since BD = 1, this makes triangle ABD an isosceles triangle with …

GMAT OFFICIAL GUIDE PS Solution: Since the regular price of each hollow pine door = 40 dollars, the regular price of each solid oak door is (2)(4) = 80 …

GMAT OFFICIAL GUIDE PS Solution: Since the car has a constant rate of 1 mile per minute, we can let r = the rate of the car in miles …

GMAT OFFICIAL GUIDE PS Solution: Since the school is 4 miles from Carlos’s house, and Barb’s house is halfway between the school and Carlos’s house, Barb’s house is 2 …

GMAT OFFICIAL GUIDE PS Solution: We can let x = 2, y = 3, and z = 4, and we have: A) z(x+1) 4(3) = 12 B) z(y+1) 4(4) …