Logical Reasoning
PrepTest 105 Section 2
Find the question you’re working on. Explore the reasoning, understand each answer, and learn from your mistakes.
Choose a question
Explanations for every question, find them by number or text.
- Q1:
French divers recently found a large cave along the…Most Strongly Supported
You can only get into the cave through an underwater tunnel.
- Q2:
A director of the Rexx Pharmaceutical Company argued…Weaken
The director claims vaccines are less profitable to market.
- Q3:
Manager: Our new computer network, the purpose of which…Necessary Assumption
The network should be installed during the day.
- Q4:
- Q5:
Archaeologist: A large corporation has recently offered…Principle – Strengthen
We should reject the corporation's offer to restore the site and let the general public visit it.
- Q6:
Besides laying eggs in her own nest, any female wood…Most Strongly Supported
Female wood ducks will lay eggs in other ducks' nests if they see them leave.
- Q7:
The crux of creativity resides in the ability to…Must be True – Exception
Creativity is making variations to a theme.
- Q8:
Millions of female bats rear their pups in Bracken Cave…Main Point
Mother bats can recognize the cry of their pups.
- Q9:
Someone who gets sick from eating a meal will often…Strengthen
Children are particularly likely to hate certain foods because of the fact that if a meal makes someone sick, they will dislike the ingredient that gave it its strongest taste.
- Q10:
Premiums for automobile accident insurance are often…Flawed Reasoning
We could save lives if we got rid of all red cars.
- Q11:
A certain credit-card company awards its customers…Necessary Assumption
You can always get stuff cheaper with rewards points than in store.
- Q12:
It is probably not true that colic in infants is cause…Weaken
It's not likely that colic happens because babies are vulnerable to some antibodies in cow's milk.
- Q13:
Gaining access to computers without…Point at Issue
- Q14:
Yolanda: Gaining access to computers without…Flawed Reasoning
- Q15:
A report of a government survey concluded that Center City was…Flawed Reasoning
The survey found that Center City had the highest dropout rate *from its schools*.
- Q16:
Brown dwarfs–dim red stars that are too cool to burn…Necessary Assumption
Any star without lithium isn't a cool brown dwarf. [or: cool brown dwarfs have lithium.]
- Q17:
- Q18:
In recent years the climate has been generally cool in…Paradox
Currently, northern Asian crops grow better when heat and humidity are slightly higher.
- Q19:
No one in the French department to which Professor…Parallel Reasoning
Professor Alban won't be teaching two introductory classes.
- Q20:
Some people have been promoting a new herbal mixture as…Necessary Assumption – Exception
The cold sufferer thinks the remedy won't work.
- Q21:
Some people have been promoting a new herbal mixture as…Method of Reasoning
The cold sufferer thinks the remedy won't work.
- Q22:
To hold criminals responsible for their crimes…Flawed Reasoning
People who obey the law are *entirely* responsible for criminal behavior.
- Q23:
Chronic back pain is usually caused by a herniated or…Most Strongly Supported
Most back pain comes from degenerated disks.
- Q24:
Each December 31 in Country Q, a tally is made of the…Must be True
No coal has gone in or out of the country since 1970.
- Q25:
Tom: Employers complain that people graduating from…Relationship Between Arguments
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