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Critical Reasoning Butler: August 2026
August 20CR 1CR 2

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CR 1

­Caffeine is a chemical compound that stimulates the human central nervous system. Research into the effects of caffeine has been performed by a myriad of companies from different places around the world, and new evidence is published every few months. High caffeine intakes cause nervousness and insomnia in some subjects while drowsiness and repose are experienced by others. Furthermore, some people report a laxative effect while in others it can result in constipation.

Which of the following conclusions is most strongly supported by the information above?

(A) Since there is not enough consistency with regards to results, research of such a chemical is not advantageous and should be discontinued.

(B) The individuality of human subjects creates difficulty when attempting to form a definitive judgement about the symptoms of caffeine.

(C) Caffeine does not affect the central nervous system in all people and, therefore, physiological symptoms can also vary.

(D) Caffeine can act as an addictive substance causing unpleasant side effects and harm to the human body's basic functions.

(E) To conduct more accurate research, examinations should be carried out on larger test groups.

___________________________
CR 2

Clearly, the pollution of the beaches is doubly harmful. Not only does the pollution hurt the wildlife inhabiting the stretches of the seashore but also the youth's education towards conservation is hindered by the frequenting of nature resorts which are continuously polluted. Therefore, it is extremely important that the authorities keep the beaches clean.

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

(A) The first is the opinion favored by the argument; the second is an additional piece of evidence which enhances the same conclusion as the former piece of evidence does.

(B) The first is an assumption; the second is a premise which adds information to a previous premise.

(C) The first is a conclusion; the second is an inference based on a previous premise.

(D) The first is a premise; the second is a conclusion based on a previous premise.

(E) The first is the general position of the argument; the second is an additional piece of evidence which stands in apparent contradiction to the previous information.
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Data Sufficiency Butler: August 2026
August 20DS 1DS 2

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DS 1

­By what percent did the population of Belleville increase from 2001 to 2003 ?

(1) The population of Belleville was 72,000 people in 2003.
(2) The population of Belleville doubled from 2001 to 2003.

_________________________
DS 2

­If Steve owns red, blue, and green marbles in the ratio of 2 : 3 : 5, respectively, how many blue marbles does he own?

(1) Steve owns 20 red marbles.
(2) Steve owns a total of 100 red, blue, and green marbles.
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Problem Solving Butler: August 2026
August 21PS 1PS 2

______________________
PS 1

Which of the following equations has only one integer pair as solution?
A. \(y = 2x\)
B. \(y = \frac{x}{2}\)
C. \(y =\sqrt{5}*x\)
D. \(y=x+1\)
E. \(y=\frac{1}{x}\)

______________________
PS 2

A 5-letter password must consist of different letters of the alphabet, with 2 vowels and 3 consonants. If the vowels must not be adjacent to each other, how many such passwords can be created?

A. 95,760
B. 159.600
C. 256.000
D. 720,000
E. 957,600
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Critical Reasoning Butler: August 2026
August 21CR 1CR 2

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CR 1

­By conducting surveys and monitoring the brainwave patterns of a group of employees who work from 9 am until 5 pm daily in a variety of fields, scientists determined that after the midday break, energy levels dropped although average decreases in activity only measured at 1%. To deal with this phenomenon in an efficient way, many companies began to provide sleeping facilities for sleepy workers who could rest for short periods of time and then return to work refreshed. Although this strategy revealed that a nap of only 25 minutes did seem to be effective at restoring energy and attentiveness, since the actual decrease in measured activity is fairly minor, a number of companies now intend to do away with this technique.

Which of the following, if true, most seriously undermines the logic of the companies' current intentions?

(A) The employees whose brainwave scans indicated an activity decrease of more than 1% after midday were also those who reported that the meals they ate during their breaks sometimes consisted of a meat item.

(B) Brain activity tests of employees who had not napped but who had performed the same number of tasks as those who had, showed these employees made logical connections that were primarily involved in the creation of basic and, in many cases, nonviable solutions.

(C) Through advancements in technology, current brainwave monitors have the potential to measure frequency differences that are very small whereas in the past only major changes in activity were detectable by researchers.

(D) Brainwaves measured before an hour of sleep has been completed are far more similar to those emitted while in an awakened state than to those emitted during sleep associated with significant rest.

(E) Employees who are presented with the option of sleeping at their places of employment are likely to take less heed in being responsible for the amount of sleep they get before arriving to perform a day's work.

________________________
CR 2

Unlike in the vast majority of species of monkeys, in a newly discovered society of minuscule monkeys in South Africa the dominant male is not the largest specimen, but rather the one with the strongest odor, even if it is quite unimpressive looking.

Which of the following, if true, would most contribute to an explanation of the facts above?

A. The new type of monkey is deaf.

B. Odor plays a role in the ability to determine ovulation among many mammals.

C. The new species of monkey is visually impaired, and thus relies on its sense of smell.

D. In most monkey communities the largest and strongest males are the alpha males and they mate with the mature females of the community.

E. Monkeys have a wide variety of parameters which together establish order of precedence among the males of a community.
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Data Sufficiency Butler: August 2026
August 21DS 1DS 2

__________________________
DS 1

­At a certain school, is the number of biology students greater than the number of chemistry students?

(1) Of the biology students, 30 percent are also chemistry students.
(2) Of the chemistry students, 40 percent are also biology students.

__________________________
DS 2

Poetry books make up what percent of the books on Beth’s bookshelf?

(1) Of the 60 books on Beth’s bookshelf, 15 are novels.
(2) There are 12 poetry books on Beth’s bookshelf.
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Problem Solving Butler: August 2026
August 24PS 1PS 2

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PS 1

The median of 5 numbers is 50, and their range is 40. If the median of the 3 smallest numbers is 40, which of the following could represent the range of the 3 largest numbers?

I. 0
II. 20
III. 40

A. I only
B. II only
C. I and II only
D.I and III only
E. I, II and III

_______________________
PS 2

A shop purchases items and sells them by adding 40% to the purchase price. When the shop offers a discount of $50 on each item, it earns a profit of $300 per item. What is the selling price?

A. $1155
B. $1225
C. $1355
D. $1455
E. $1555
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Critical Reasoning Butler: August 2026
August 24CR 1CR 2

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CR 1

­A recent study has revealed, through meticulous research, a link between the harmful hydrocarbons in air pollutants and the IQ test scores of children. The research involved measuring the quality of air that pregnant women breathed during the third trimester of pregnancy, and then following the children born from that pregnancy until an IQ test could be administered. Many external factors were taken into consideration, such as the mother's IQ and the family's home environment with regards to intellectual development. Health officials, having studied this information, plan to tackle the phenomenon by increasing public awareness on the matter through campaigns aimed at warning parents-to-be.

In the argument, the two portions in boldface play which of the following roles?

(A) The first associates a cause with an effect; the second demonstrates the reasoning behind the formation of such an association.

(B) The first is a relationship contradicted by the conclusion; the second is factual information that supports that conclusion.

(C) The first is the result of an analysis; the second weakens the possibility of doubt with regards to the accuracy of that analysis.

D) The first is a correlation between two entities; the second is evidence that directly strengthens the existence of that correlation.

(E) The first offers a logical connection between two factors; the second indicates a possible flaw in the credibility of that connection.

______________________
CR 2

­Because the Gelrica temple, which attracts thousands of tourists every month, was built using volcanic-composite rocks, its ruins are still fairly intact and in fair condition, considering their age. However, vibrations caused by the constant footsteps of visitors to the site are a major force behind the recent acceleration of its decomposition, significantly more damaging than acid rain and smog from the nearby metropolitan. There are currently no funds available to install protective systems at the site. Since the only funding for the ruins comes from entrance fees paid by visitors, the site's destruction seems inevitable.

The answer to which of the following would be most useful in evaluating the argument?

A. For how long would the site need to be closed in order to complete the installation process of the protective systems?

B. How much damage would be done to the site before sufficient funds could be raised to pay for the protective systems?

C. What would be an accurate estimation of the price for the installation of adequate protective systems at the site?

D. Is the source of the volcanic-composite rocks known?

E. What percentage of the overall damage is caused by the footsteps of tourists visiting the temple ruins?
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Data Sufficiency Butler: August 2026
August 24DS 1DS 2

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DS 1

­In the Reagan High School swim club, 120 members swim the backstroke or the crawl or both. If 30 of these members do not swim the backstroke, how many members swim both the crawl and the backstroke?

(1) Of the 120 members, 72 do not swim the crawl.
(2) A total of 48 members swim the crawl.


_______________________
DS 2


­A drawer contains 12 socks, of which 8 are black and 4 are white. If 3 of the socks are removed, how many of the socks that remain in the drawer are black?

(1) The socks that remain in the drawer have a ratio of 2 black to 1 white.
(2) One of the first two socks removed is black.
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