Veritas Prep Daily GMAT Challenge – Critical Reasoning and Algebra!:
Each day this week, we will be challenging the Beat The GMAT community with a Verbal and Quant question that we consider especially difficult. The first 10 people to provide the correct answer to either question in the comments section will win a Veritas Prep GMAT prep book. Make sure to submit your answer(s) by 5pm PDT today to be eligible for the contest. Winners will be announced in tomorrow’s Veritas Prep post. Good luck!
Critical Reasoning Challenge Problem
Zebra mussels, a nuisance when they clog the intake pipes of nuclear power plants and water plants along the Great Lakes, have some redeeming qualities. Since the mussels feed voraciously on algae that they filter from the water that passes by them, bags of zebra mussels suspended in the discharge streams of chemical plants significantly improve water quality, even removing some hazardous waste.
Which one of the following is most strongly supported on the basis of the statements above, if they are true?
(A) Zebra mussels arrived in the Great Lakes on transatlantic freighters and, since they have no natural enemies there, are rapidly displacing the native species of clams.
(B) If the mussels spread to areas of the Mississippi River where native clams provide the basis for a cultured pearl industry, that industry will collapse, since the mussels are unsuitable for such use and would displace the clams.
(C) There is no mechanical means available for clearing intake pipes by scraping the mussels from them.
(D) The algae on which the mussels feed would, if not consumed by the mussels, themselves clog the intake pipes of nuclear power plants and water plants.
(E) Any hazardous waste the mussels remove from chemical-plant discharge will remain in the mussels, if they do not transform it, and they then must be regarded as hazardous waste.
Algebra Challenge Problem
If a motorist had driven 1 hour longer on a certain day and at an average rate of 5 miles per hour faster, he would have covered 70 more miles than he actually did. How many more miles would he have covered than he actually did had he driven 2 hours longer and at an average rate of 10 miles per hour faster on that day?
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