GMAT Online Practice Questions and Answers

Was the median height of the 25 children in a certain class at least 2 percent greater than the average (arithmetic mean) height of the 25 children?

(1)

The median height of the 25 children was 2 centimetefs greater than their average height.

(2)

The sun of the heights of the 25 children was less than 2,550 centimeters.

A.

Statement (1) ALONE is sufficient but statement (2) alone Is not sufficient.

B.

Statement (2) ALONE is sufficient, but statement (1) alone is not suf ficient.

C.

BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE Is sufficient.

D.

EACH statement ALONE Is sufficient.

E.

Statements (1) and (2) TOGETHER are NOT sufficient.

In a certain nursery, 15 percent of the plants developed a fungus and died. If 40 percent of the plants that developed the fungus did not die, what percent of the plants in the nursery developed the fungus?

A. 25%

B. 27%

C. 35%

D. 40%

E. 55%

A major manufacturer of outdoor clothing spends a significant portion of its overhead costs on transportation in its home markets. Everywhere the cost of fuels, including marine and aviation fuels, has been rising steeply for the last six

months.

But during this period the profits of the company have tripled.

Which of the following would, if true, most help explain why the phenomenon described above occurred?

A. The company owns its own shipping division.

B. The sales volume of the company is twice as large as that of its largest competitor.

C. The major competitors of the company in its home markets are companies exporting from overseas.

D. The company has recently embraced a buy-one-get-one-free policy in its home markets.

E. The company is implementing a no-returns, no-refunds policy.

Although many people assume that excessive use of the saltshaker fully accounts for the overly salt-rich diet of the United States, the fact is that about 77 percent of the salt, even with Americans who sprinkle liberally, comes from processed foods such as lunch meats, commercial soups, packaged cakes, and potato chips.

A. about 77 percent of the salt, even with Americans who sprinkle liberally, comes

B. about 77 percent of the intake of salt even on the part of Americans who sprinkle liberally will come

C. even Americans who sprinkle liberally derive about n percent of their salt

D. even Americans sprinkling liberally should derive about 77 percent of their salt

E. even sprinkling liberally, about 77 percent of the American intake of salt comes

According to the passage, the majority of the pairings observed in Sommer's study exhibited postconflict affinity under what conditions?

A. Only when one member of the pair was markedly stronger than the other

B. Only during certain times of the year, such as mating season

C. More often in the form of huddling than in the form of grooming

D. More often while held in captivity than when interacting in the wild

E. At no time whatsoever

Under laboratory conditions, fruit flies can learn to respond to odors that elicit no response from them in nature. Mutant fruit flies that cannot produce a certain enzyme are, however, incapable of such learning. These mutant flies respond to other odors just as ordinary fruit flies do. Thus it is unlikely that the enzyme's absence impairs the fruit flies' perception of odors, since presumably fruit flies would not have an enzyme that was needed only for the perception of odors that fruit flies do not respond to in nature. Given that many researchers believe that this enzyme is somehow involved in the process of forming memories, what the enzyme's absence probably impairs is the fruit flies' ability to learn.

In the argument given, the two boldfaced portions play which of the following roles?

A. The first is a conclusion drawn about one possible explanation of the phenomenon at issue; the second presents an explicit assumption that is introduced to support that conclusion.

B. The first is a hypothesis that the argument seeks to establish; the second is an alternative hypothesis, which the argument provides grounds for rejecting.

C. The first is a hypothesis that the argument seeks to establish; the second presents an explicit assumption that has been used in arguing for the position that the argument opposes.

D. The first provides evidence in support of the main conclusion of the argument; the second is a claim that has been advanced in order to undermine the force of that evidence.

E. The first is an objection that has been raised against the position adopted in the argument; the second presents an explicit assumption that is introduced in order to meet that objection.

Until the Apollo astronauts brought samples of lunar material to Earth during 196?72, scientists believed that the Moon's surface was largely undisturbed, given its dry, airless environment. Examination of the samples has shown otherwise. Micrometeorites, many smaller than a pencil point, constantly rain onto the Moon at up to 100,000 kilometers per hour, chipping materials or forming microscopic craters. Some melt the soil and vaporize and recondense as glassy coats on other specks of dust. Impacts weld debris into lumps of heterogeneous matter called "agglutinates." Complicated interactions with solar particle streams convert iron into myriads of microscopic iron grains. The regdith--pebbles, sand, and dust-from these erosion processes blankets the Moon. Much of the top layer consists of a complex abrasive dust of microscopic glass shards that can grind machinery and sealing devices and damage human lungs.

The Apollo specimens held by the United States are doled out in ultra-small samples to scientists who demonstrate that nothing else will suffice for high-value experiments. Renewed interest In lunar exploration in the late 1980s meant that

materials designed to simulate lunar regolith--simulants--were needed for research to develop schemes for lunar building and procedures for extracting elements such as oxygen found abundantly in regolith. That led to the development of JSC-1 in 1993, made of volcanic cinder cone from a quarry in Arizona in the U.S. The more than 22 metric tons made was in high demand. Efforts are now afoot to manufacture 16 metric tons of JSC-1 A, with 1 ton of fine grains, 14 tons of moderately fine, and 1 ton of coarse.

The reason cited in the passage for developing a few root simulants (see highlighting) is

A. the similarity of the physical structure of lunar regolith from different areas of the Moon

B. the nature of the tests for which the lunar regolith simulants were originally developed

C. the impracticality and expense of individually producing a unique simulant for each of many different lunar locations

D. the similarity of chemical composition of lunar regolith and terrestrial volcanic soils

E. the difficulty of obtaining simulant components from widely scattered quarries and mines

Although a village in a drouqht-stncken area may at first be resistant to using new agricultural techniques, if the village leaders are consulted beforehand and the benefits of the techniques are demonstrated clearly, the agricultural ministry can often effect a real and positive change in agricultural productivity and thus in economic security.

A. a village in a drought-stricken area may at first be resistant to using new agricultural techniques, if the village leaders are consulted beforehand and the benefits of the techniques are demonstrated clearly,

B. a village may be resistant to first using new agricultural techniques in a drought-stricken area, if they consult beforehand with village leaders and clearly demonstrates the techniques' benefits,

C. at first in a drought-stricken area a village may resist the use of new agricultural techniques, if their leaders are consulted beforehand and their benefits are clearly demonstrated,

D. at first a village in a drought-stricken area may be resistant to new agricultural techniques, if the leaders are consulted beforehand and one clearly demonstrates their benefits,

E. a village in a drought-stricken area may first resist using new agricultural techniques if village leaders are consulted beforehand and the benefits of the techniques are clearly demonstrated,

It can be inferred that the author sees informal contact between managers and customers as an example of which of the following?

A. The development of pathways for information and action that bypass traditional avenues of corporate communication

B. The changes in business conditions that have created a need for new managerial techniques

C. The extension of managerial authority to external relationships

D. An outmoded approach to management that needlessly constrains managers from vitiating projects on their own

E. The effective utilization of official contact points

According to the passage, Edelman has made innovations in the study of which of the following?

A. The behavior of multicelular organs

ii. The molecular structure of animal and plant tissue

III. The overall structure of complex organisms

B. i only

C. ii only

D. III only

E. i and ii only

F. ii and III only