Admission Tests GMAT Online Practice Questions and Exam Preparation

Admission Tests GMAT Online Questions & Answers

• Question 151:

  The reasoning in the final paragraph most strongly implies that the author makes which of the folowing assumptions?

  A. The vast majority of the planets in the cosmos have atmospheres.
  B. Living beings that evolve on planets orbiting hot stars are more likely to develop the capacity to see than are living beings that evolve on planets orbiting average-temperature stars.
  C. Living beings are most likely to evolve on planets with atmospheres containing gases that are abundant in the cosmos.
  D. If Irving beings evolve on planets orbiting the hottest stars, they will likely develop eyes that are sensitive to gamma rays.
  E. The frequencies of light that pass through a planet's atmosphere without being absorbed are the frequencies that the nearest star emits most abundantly.
  A. The vast majority of the planets in the cosmos have atmospheres.

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  Explanation/Reference:

  Light exists on a spectrum of frequencies extending from gamma rays at the highest frequencies to radio waves at the lowest, though human eyes are sensitive to only a narrow range of frequencies in the middle known as the visible spectrum. The different colors we see correspond to the different frequencies of light within that range. Given that there are so many frequencies of light, one might wonder why our eyes didnt evolve to be sensitive to more frequencies. Gamma rays from space collide with Earth's atmosphere, which converts some of their energy to heat and creates a distinctive cascade of subatomic particles down toward the ground. However, the rays themselves are entirety absorbed before they can reach Earth's surface. Thus, Earth would appear to be pitch black to eyes that were only sensitive to gamma rays. Similarly, the majority of frequencies of light that are higher or lower than those in the visible spectrum--such as ultraviolet and most infrared frequencies, respectively--are mostly or entirely absorbed by Earth's atmosphere. One reason we see the frequencies we do is that visible-spectrum light generally passes through our atmosphere without being absorbed or reflected. Another reason is that the Sun, in some respects an average star, emits most of its light at frequencies in the visible spectrum, whereas a hot star emits most of Its light at ultraviolet frequencies and a very cool star emits most of its light at infrared frequencies. Indeed, to remarkably high precision, the human eye to most sensitive to the exact frequency in the yellow part of the spectrum at which the Sun is the brightest Even if there are living beings on other planets, it is not likely that they would see mainly at very different frequencies than we do. Virtually all gases that are abundant in the cosmos tend to allow frequencies in the visible spectrum to pass through while absorbing other frequencies, and all but the coolest stars put out much, If not most, of their light in the visible spectrum. If there are Irving beings on other planets, they probably see at roughly the same frequencies as we do, though there may be occasional exceptions.

• Question 152:

  

  A +b is an even integer. ab is an even integer.

  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 sufficient.
  C. BOTH statements TOGETHER ace sufficient, but NEITHER statement ALONE is sufficient.
  D. EACH statement ALONE is sufficient.
  E. Statements (1) and (2) TOGETHER are NOT sufficient.
  B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

• Question 153:

  A meteorite found in the Alan Hills ol Antarctica is only the tenth meteorite known to have originated from Mars and the first one known to be farmed beneath the Martian surface.

  A. to have originated from Mars and the first one known to be formed
  B. to have originated on Mars and the first one known to have been formed
  C. to originate on Mars and the first one that is known to form
  D. that originated on Mars and the first one known that formed
  E. that has originated from Mars and the first one known that has been formed
  D. that originated on Mars and the first one known that formed

• Question 154:

  Which of the following would, if true, most help substantiate the highlighted claim In the first paragraph?

  A. The closer a planet is to its parent star, the more likely it is to be obscured by glare in Hubble images of that star.
  B. Astronomers calculate that most stars that have planets have at least one planet that orbits at a distance no less than that between HR 8799 and its outermost planet
  C. Many of the young stars photographed by Hubble produce at least as much mattered light as does HR 8799 though they distribute that light over a much area.
  D. In 1996, the astronomers examining the Hubble images were able to discern very few extrasolar planets despite having included a large number of images of your>g stars in their examinations.
  E. A large proportion of the stars that are shown in the archived Hubble images and suspected of spawning planets are at least as old as, if not substantially older than, HR 8799.
  E. A large proportion of the stars that are shown in the archived Hubble images and suspected of spawning planets are at least as old as, if not substantially older than, HR 8799.

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  Explanation/Reference:

  Previously unknown extrasolar planets-planets outside our solar system-- probably await discovery In archival images taken by the Hubble Space Telescope. A new technique allows astronomers to model the amount and distribution of scattered light produced by young stars suspected of spawning planets and remove that light from images of those stars. Once the glare of the parent stars' light is removed, planets may show up In Images already taken by Hubble's infrared cameras, since heat emitted by planets produces telltale wavelengths of infrared light. In 2008, astronomers using powerful Earth-based telescopes were able to detect three planets orbiting the star HR 8799 that were not previously detected by astronomers who examined infrared Hubble images of the star in 1998. David Lafrentere--a member of the team of astronomers who detected the planets in 2006 --then applied the new technique to those Hubble images and managed to uncover the outermost of the three planets. The others, tying closer to the star, still could not be distinguished against the background of the star's light. Lafrenifre's work has helped reaffirm the importance of maintaining long-term archives, and--because Hubble's infrared cameras record some wavelengths of light that cannot penetrate through the atmosphere to reach Earth's surface- revealed new information about the outermost of HR 8799's planets.

• Question 155:

  Beginning at noon yesterday, water was removed from a partially filled water tank at a constant rate of 300 liters per hour. When there were 600 liters of water left in the tank, no more water was removed from the tank. Were there more than 1,000 liters of water in the tank at noon yesterday?

  (1)

  There were 600 liters of water in the tank at 2:00 yesterday afternoon. (2) There were more than 650 liters of water in the tank at 1:00 yesterday afternoon.

  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 sufficient.
  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.
  D. EACH statement ALONE is sufficient.

• Question 156:

  HOTSPOT

  The table provides data about 12 different Persian rugs currently available for sale by a rug dealer. For each rug, the data includes the number of knots per square inch (KPSI) in the yarn, which is consistent throughout the rug.

  

  Hot Area:

  

  

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  Explanation/Reference:

• Question 157:

  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.

  Which of the following can most reasonably be inferred from the passage?

  A. Lunar regolith is unlikely to provide any of the raw materials for construction of permanent buildings on the Moon.
  B. The micrometeorites bombarding the lunar surface pose no risk to humans exploring the Moon.
  C. It will probably be scientifically possible to generate on the Moon supplies of air for future lunar explorers.
  D. Metal structures built on the Moon will be susceptible to rust.
  E. Future human lunar explorers will probably have to have water transported to the moon for their use.
  B. The micrometeorites bombarding the lunar surface pose no risk to humans exploring the Moon.

• Question 158:

  Candidate McFee received 12,000 votes, which was

  

  of the total number of votes. If .r additional people had voted and each had voted for McFee, then McFee would have received

  

  of the total number of votes. What is the value of x?

  A. 8,000
  B. 6,000
  C. 4,000
  D. 3,000
  E. 2,000
  B. 6,000

• Question 159:

  HOTSPOT

  The manager of 6 employees, Employees A-F, will select a committee by choosing exactly 3 of the employees to be on the committee. The manager's supervisor recommended that Employee A not be chosen If either Employee C or Employee F (or both) is chosen. Select for Number if recommendation not followed the maximum number of selections the manager has available If the recommendation is not followed, and select for Number If recommendation is followed the maximum number of selections the manager has available If the recommendation is followed, so that the selections are jointly consistent with the given information. Make only two selections, one in each column.

  Hot Area:

  

  

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  Explanation/Reference:

• Question 160:

  A certain law firm has 28 lawyers and has offices in three states, X, Y, and Z. Every lawyer in the firm is either Scensed in all three states or is licensed in only one of the three states. If 10 lawyers are kensed in State X, 11 are licensed in State Y, and 13 are licensed in State Z, how many lawyers are licensed only in State Z ?

  A. 3
  B. 7
  C. 8
  D. 10
  E. 25
  D. 10