GMAT Question of the Day (Sep 23): Arithmetic and Critical Reasoning

By - Sep 23, 02:00 AM Comments [0]

Math (DS)

Are integers x, y, and z consecutive?

1. y equals the arithmetic mean of x and z
2. x = -z

For the correct answer, please drag your mouse over the hidden text. Explanation is linked below.

Question Discussion & Explanation

Correct Answer - E - (click and drag your mouse to see the answer)

GMAT Daily Deals
  • Manhattan GMAT: 99 percentile teachers and superior curriculum at a more affordable price. Save @ GMAT Club. Save $325!
  • There's still a little time to save $50 on mbaMission Application Writing Bootcamps - Learn More. Learn More
  • The Princeton Review teaches both material & testing strategies - not just the answers. Save $350 @ GMAT Club. Learn More!

Verbal (CR)

The Earth’s rivers constantly carry dissolved salts into its oceans. Clearly, therefore, by taking the resulting increase in salt levels in the oceans over the past hundred years and then determining how many centuries of such increases it would have taken the oceans to reach current salt levels from a hypothetical initial salt-free state, the maximum age of the Earth’s oceans can be accurately estimated.

Which of the following is an assumption on which the argument depends?

(A) The quantities of dissolved salts deposited by rivers in the Earth’s oceans have not been unusually large during the past hundred years.
(B) At any given time, all the Earth’s rivers have about the same salt levels.
(C) There are salts that leach into the Earth’s oceans directly from the ocean floor.
(D) There is no method superior to that based on salt levels for estimating the maximum age of the Earth’s oceans.
(E) None of the salts carried into the Earth’s oceans by rivers are used up by biological activity in the oceans.

Question Discussion & Explanation
Correct Answer - A - (click and drag your mouse to see the answer)

Like these questions? Get the GMAT Club question collection: online at GMAT Club OR on your Kindle OR on your iPhone/iPad

Browse all GMAT Questions of the Day

Subscribe to GMAT Question of the Day: E-mail | RSS

[0] Comments to this Article

Comments are closed.