Official Guide practice (find these in your Official Guide or at www.gmatclub.com)

Solve the problems below using the method of rates=ratios. Challenge yourself to solve them without using algebra. It’s possible!

PS02286 When traveling at a constant speed of 32 miles per hour

PS17479 During a certain time period, Car X

PS13101 Pumping alone at their respective constant rates, one inlet pipe fills

PS09737 Working simultaneously and independently at an identical constant rate

PS08865 Three printing presses, R, S, and T,

PS04617 After driving to a riverfront parking lot

DS00858 Machine R and machine S work

DS01257 A conveyor belt moves bottles

DS06315 On a certain nonstop trip, Marta averaged x miles

DS16164 At what speed was a train traveling

More Official Guide Practice

These problems can also be solved using the method of rates=ratios. However, they have some extra nuances. Notice that: unit conversions are basically rates; a unit contains the relevant formula (the unit “mph” means ‘number of miles’ divided by ‘number of hours’); and, when you see variables in answer choices, it’s possible to pick a convenient smart number to solve the problem.

PS02295 On a vacation, Rose exchanged

PS39811.02 Exchange Rates in a Particular Year

PS92820.02 A salesperson who had been driving at a speed of 100 kilometers per hour

PS07672 A doctor prescribed 18 cubic centimeters

PS49140.02 If the mass of 1 cubic centimeter of a certain substance is 7.3 grams

PS30720.02 A certain state’s milk production

PS08570 During a trip, Francine traveled x percent

PS00428 Working simultaneously at their respective constant rates, Machines A and B

DS08995 In planning for a car trip, Joan estimated