Aptitude Tests 4 Me

Analytical Ability

310. Five bears – Jinan, Knot, Lee, Mushu and Nee-Hau – are kept in three adjacent rooms numbered 1-3 from left to right.
There is at least one bear in each room.
Knot is in a room to the left of Lee's.
Mushu and Nee-Hau are not kept in the same room.
Either Mushu or Jinan, but not both, are kept in room 2.
Nee-Hau is kept in room 3.
Which one of the following CANNOT be true?

 (a) One bear is kept in room 2 (b) Two bears are kept in room 1 (c) Two bears are kept in room 2 (d) Three bears are kept in room 2

311. Each country was visited by at least one of the travellers.
Each traveller visited either two or three different countries.
Only one traveller visited Qatar.
Every traveller who visited Mauritania went to Nepal as well.
A traveller who visited Qatar did not visit Peru.
John visited all of the countries Kate did.
Which one of the following could be a list of the countries Lenny visited?explanation

 (a) Mauritania, Nepal, Oman (b) Oman, Qatar, Peru (c) Nepal, Oman, Qatar (d) Qatar, Mauritania, Oman

312. This tree root indicates the absorption of saltwater and yet none of the other tree roots in the proximity contain traces of saltwater. Since the other trees are located in a forest on land with an altitude 10 percent higher than the surrounding area, the area surrounding the forest was probably covered by a south-flowing saltwater sea.
Which one of the following, if true, would most weaken the above argument?

 (a) There are no tree roots with signs of saltwater absorption between here and the nearest ocean (b) The closest geological source of saltwater is a sea 100 miles south of the forest (c) There are no geological sources of saltwater north of this forest (d) Most trees that use saltwater take only half their water from the ground and half from precipitation

313. Scientists believe that many ordinary painkillers actually cause, not relieve, headaches because of medication overuse. They estimate that half of all chronic migraines, and up to 25 percent of all headaches, are actually "rebound" episodes triggered by the overuse of common pain medications. Studies of the relation between painkillers and headaches have always involved administering to test animals doses of painkillers massive enough to affect animals' nerve cells in the brain, and then measuring their levels of pain. Results of studies on the most common causes of headaches until now have led to an overestimation of the degree to which medication overdose contributed to headaches.
Which one of the following, if true, most strengthens the above argument?

 (a) In the doses used until now in studies on "rebound" headaches triggered by painkiller overuse, animals' neurons (or nerve cells) are often not affected (b) Dilation of neurons causes chronic migraines more frequently than ordinary headaches (c) Occasionally test animals were administered doses of painkillers larger than the largest possible human exposure levels (d) People take more painkillers to relieve migraines than to relieve ordinary headaches

314. Julius Rosenberg, a member of the Communist Party in the U.S., must have been a spy for the Soviet Union during the 1950's. In 1940 he joined the Army Signal Corps Engineering Laboratories at Fort Monmouth, New Jersey, where research on electronics, communications, radar and guided missile controls, all with important ramifications for the atom bomb, was undertaken.
Which of the following, if true, would most weaken the above argument?

 (a) Rosenberg worked at the laboratories for two years only, a period that might be inadequate for gaining the entire secrets of the atom bomb (b) Rosenberg had publically denounced the development of the atom bomb by any country (c) Investigations into that time period show that up to a dozen U.S. communist sympathizers were employed in sensitive nuclear research labs around the country (d) The Soviet court documents cannot be considered reliable if they were produced during the reign of the communists

315. Climatologists have hypothesized that the giant California redwoods are suffering from stress due to a dissipation of summer fogs. In one extensive study, researchers looked at data on the height of cloud cover, since the lower the cloud cover height, the greater the frequency of fogs. The data had been recorded hourly at several airports from 1951 to 2008 and extrapolated back to 1901. The study supported the climatologists' hypothesis, since the analysis showed that since the early 20th century, fog frequency in summers has declined by about one-third.
Which one of the following, if true, would most weaken the above argument?

 (a) The pattern of monthly rainfall along the northern California coast has shifted significantly over the last 100 years (b) Botanists believe that the redwood's ability to conserve water is the result of a mechanism found in the trees' roots and not the result of the high humidity in fog (c) At the beginning of the 20th century the daytime temperature coast-inland difference was 17 degrees Fahrenheit; today it is just 11 degrees Fahrenheit. (d) Using tree ring data from redwoods to infer climate change is problematic because it is hard to determine whether the width of the tree ring reflects winter rain, summer fog, or other factors

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