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A computer equipped with signature-recognition software, which restricts access to a computer to those people whose signatures are on file, identifies a person’s signature by analyzing not only the form of the signature but also such characteristics as pen pressure and signing speed. Even the most adept forgers cannot duplicate all of the characteristics the program analyzes.
Which of the following can be logically concluded from the passage above?

The time it takes to record and analyze a signature makes the software impractical for everyday use.
Computers equipped with the software will soon be installed in most banks.
Nobody can gain access to a computer equipped with the software solely by virtue of skill at forging signatures.
Signature-recognition software has taken many years to develop and perfect.
In many cases even authorized users are denied legitimate access to computers equipped with the software.
Explanation:
The passage asserts that skill at forging signatures is not by itself sufficient to match all of the characteristics that the software analyzes to identify signatures. Because the software gives access only after identifying a signature, access cannot be achieved by someone employing forging skill alone. Choice C is thus the best answer.
The passage gives no information about how fast the software operates or about how long the software was under development, so neither A nor D can be concluded. Choice B is incorrect since the software might have features not mentioned in the passage that make it unattractive to banks. The passages give no reason to think that errors of the sort that choice E describes, even if made, would be numerous.
Additional Questions

Firms adopting “profit-related-pay” (PRP) contracts pay wages at levels that vary with the firm’s profits. In the metalworking industry last year, firms with PRP contracts in place showed productivity per worker on average 13 percent higher than that of their competitors who used more traditional contracts.
If, on the basis of the evidence above, it is argued that PRP contracts increase worker productivity, which of the following, if true, would most seriously weaken that argument?

Answer

It is often thought that our own modern age is unique in having a large number of people who live into old age. It has frequently been assumed that plagues, wars, and harsh working conditions killed off most people in previous ages before they could reach old age. However, recent research shows that in 17th century Europe, for example, people over sixty comprised 10 percent of the population. The studies also revealed that although infant mortality remained high until the 20th century in Europe, people who survived to adulthood could expect to live to be old.
The portions in boldface play which of the following roles in the argument above?

Answer

A rare disease, malicitis, is being diagnosed with increasing frequency. The number of cases reported this year is more than double the number reported four years ago. The government should now allocate more funds for treatment and prevention of malicitis.
All of the following, if true, would weaken the conclusion except

Answer

Recent studies have highlighted the harmful effects of additives in food (colors, preservatives, flavor enhancers etc.). There are no synthetic substances in the foods we produce at Munchon Foods ` we use only natural ingredients. Hence you can be sure you are safeguarding your family`s health when you buy our products.
Which of the following, if true, would most weaken the contention of Munchon Foods?

Answer

Jay: We have too many people working on each of our computers in the office. The high frequency of breakdowns is due to too many people handling the same hardware.
Ada: We have just as many people working in our office, yet we hardly need any repairs to our systems. Our systems must be more robust than yours.
Ada`s argument would be most strengthened by providing data on the

Answer

In a recent study of responses to visual images, researchers found that women most frequently gave the rating `most attractive` to images of male faces that were more feminine in contour, and rated more masculine faces, on average, `less attractive`. The researchers concluded that modern women prefer men who are less obviously masculine in their facial features.
The conclusion would be most severely weakened if which of the following were true?

Answer

A discount retailer of basic household necessities employs thousands of people and pays most of them at the minimum wage rate. Yet following a federally mandated increase of the minimum wage rate that increased the retailer’s operating costs considerably, the retailer’s profits increased markedly.
Which of the following, if true, most helps to resolve the apparent paradox?

Answer

A fruit known as amla in certain parts of Asia is an excellent source of vitamin C. A small quantity of the fruit grated and added to salads provides almost all the daily requirement of this vitamin. However, the fruit is very sour. A new process designed to remove most of the sour taste will make the fruit acceptable to American tastes. We are therefore starting to grow this fruit for sale in the United States.
The argument above assumes all of the following except

Answer

The enormous distances between stars are not spaces entirely devoid of matter. The interstellar spaces are filled with `dust`: very low density matter. This miniscule amount of matter, spread over almost infinite distances, acts like a curtain obscuring the stars that lie behind. If it were not for this material we would see no dark patches in the sky at night: the sky would be entirely covered with stars.
The two parts in boldface play what roles in the argument above?

Answer

Anton: I sold my house on an internet site last year and was happy with the price. I got a speedy sale and the cost of advertising was insignificant. I would advise you to avoid real estate agents.
Barbie: It is in the interest of the real estate agent to get me the best price for my property because he gets a commission based on the selling price. Therefore, when selling my house I will certainly use an agent rather than trying to sell the house by word of mouth, or by advertising in newspapers or on the internet.
Barbie`s could strengthen her position by pointing out all of the following except

Answer
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