Under United States law, a distinctive package design can be legally protected against copying. Lorex shampoo, a leading brand, is packaged in a triangular-shaped bottle with a gold label. A major pharmacy chain has introduced a similar, less expensive shampoo in similarly shaped bottles with plain black-and-white labels carrying the chain's name. Though the triangular shape is distinctive, the manufacturer of Lorex has not legally challenged its use for the chain's shampoo.

Which of the following, if true, provides the strongest reason for the manufacturer of Lorex not to challenge the chain's use of the triangular package design?

Folic acid is a nutrient present in leafy vegetables and some other foods. In the blood, folic acid inhibits the formation of substances found in arterial blockages that commonly cause heart attacks. Moreover, in a long-term study of 10,000 individuals, the subgroup with the highest blood levels of folic acid had fewer heart attacks than the subgroup with the lowest levels. Therefore, a decrease in dietary folic acid will increase the risk of a heart attack.

Which of the following, if true, would most strengthen the argument?

When positive integer n is divided by 7, the remainder is 2. What is the value of n?

(1) n is less than 20.
(2) When n is divided by 8, the remainder is 0.

If P is sequence of n positive integers,where Se denotes the sum of all even integers and So denotes the sum of all odd integers. What is the the value of |Se -So|?

(A) P is a sequence of n consecutive positive integers

(B) Number of terms in the sequence P is 8

Jen walked along a track at an average speed of 100 meters per minute. Was the length of the track greater than half a kilometer? (1 kilometer = 1000 meters)

(1) She took more than 250 seconds to cover the track.

(2) She took less than 290 seconds to cover the track.

Of the employees at a company, 60 percent were men and, of these, were still employed after a recent corporate restructuring. If the number of women who were still employed after the restructuring was five times the number of men who were employed after it, what percent of the women were still employed after the restructuring?

The traditional treatment of strep infections has been a seven-day course of antibiotics, either penicillin or erythromycin. However, since many patients stop taking those drugs within three days, reinfection is common in cases where those drugs are prescribed. A new antibiotic requires only a three-day course of treatment. Therefore, reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed.

Which of the following, if true, most strengthens the argument?

Meteorologists say that if only they could design an accurate mathematical model of the atmosphere with all its complexities, they could forecast the weather with real precision. But this is an idle boast, immune to any evaluation, for any inadequate weather forecast would obviously be blamed on imperfections in the model.

Which of the following, if true, could best be used as a basis for arguing against the author's position that the meteorologists' claim cannot be evaluated?

Meteorologists say that if only they could design an accurate mathematical model of the atmosphere with all its complexities, they could forecast the weather with real precision. But this is an idle boast, immune to any evaluation, for any inadequate weather forecast would obviously be blamed on imperfections in the model.

Which of the following, if true, would cast the most serious doubt on the meteorologists’ boast?

If x=, which of the following must be true?