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- Question
Statements: Some hills are rivers. Some rivers are deserts. All deserts are roads.
Conclusions:
- Some roads are rivers.
- Some roads are hills.
- Some deserts are hills.
Options- A. None follows
- B. Only I follows
- C. Only I and II follow
- D. Only II and III follow
- E. All follow
- Correct Answer
- Only I follows
ExplanationSome hills are rivers. Some rivers are deserts.Since both the premises are particular, no definite conclusion follows.
Some rivers are deserts. All deserts are roads.
Since one premise is particular, the conclusion must be particular and shouldn't contain the middle term. So, it follows that 'Some rivers are roads'. I is the converse of this conclusion and so it holds.
Some hills are rivers. Some rivers are roads.
Again, since both the premises are particular, no definite conclusion follows.
More questions
- 1. 28 25 5 21 18 5 14
Options- A. 11 5
- B. 10 7
- C. 11 8
- D. 5 10
- E. 10 5 Discuss
Correct Answer: 11 5
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.- 2. Look at this series: (1/9), (1/3), 1, ____ , 9, ... What number should fill the blank?
Options- A. (2/3)
- B. 3
- C. 6
- D. 27 Discuss
Correct Answer: 3
Explanation:
This is a multiplication series; each number is 3 times the previous number.- 3. Statements: The serious accident in which a person was run down by a car yesterday had again focused attention on the most unsatisfactory state of roads.
Conclusions:
- The accident that occurred was fatal.
- Several accidents have so far taken place because of unsatisfactory state of roads.
Options- A. Only conclusion I follows
- B. Only conclusion II follows
- C. Either I or II follows
- D. Neither I nor II follows
- E. Both I and II follow Discuss
Correct Answer: Both I and II follow
Explanation:
Since the accident has caused concern, it must be fatal. So, I follows. The use of the word 'again' in the statement justifies the fact mentioned in II. So, II also follows.- 4. Statement: Should there be reservation in Government jobs for candidates from single child family?
Arguments:
- No. This is not advisable as the jobs should be offered to only deserving candidates without any reservation for a particular group.
- Yes. This will help reduce the growing population in India as the parents will be encouraged to adopt single child norm.
Options- A. Only argument I is strong
- B. Only argument II is strong
- C. Either I or II is strong
- D. Neither I nor II is strong
- E. Both I and II are strong Discuss
Correct Answer: Neither I nor II is strong
Explanation:
The Government has already made provisions for reservation of jobs for the economically backward sections, which is a must. So, abolishing the practice of reservation altogether has no meaning. Thus, argument I is vague. Also, more reservations would lead to non-recruitment of many more deserving candidates. Besides, such a reservation, if implemented, will cater to the job requirements of only a small section of population and not a major part of it. So, argument II also does not hold strong.- 5. Statement: Whenever you have any doubt on this subject, you may refer to the book by Enn and Enn.
Assumptions:
- The book by Enn and Enn is available.
- There is no other book on this subject.
Options- A. Only assumption I is implicit
- B. Only assumption II is implicit
- C. Either I or II is implicit
- D. Neither I nor II is implicit
- E. Both I and II are implicit Discuss
Correct Answer: Only assumption I is implicit
Explanation:
The recommendation of the book by Enn and Enn implies that it is available. So, I is implicit. Also, the book has been referred to as a good one, but this does not mean that no other books are available on the subject. So, II is not implicit.- 6. Statements: All pencils are birds. All birds are skies. All skies are hills.
Conclusions:
- All pencils are hills.
- All hills are birds
- All skies are pencils.
- All birds are hills.
Options- A. Only I and II follow
- B. Only I and III follow
- C. Only III and IV follow
- D. All follow
- E. None of these Discuss
Correct Answer: None of these
Explanation:
All pencils are birds. All birds are skies.Since both the premises are universal and affirmative, the conclusion must be universal affirmative (A-type) and should not contain the middle term. So, it follows that 'All pencils are skies'.
All birds are skies. All skies are hills.
As discussed above, it follows that 'All birds are hills'. Thus, IV follows.
All pencils are skies. All skies are hills.
Clearly, it follows that 'All pencils are hills'. Thus, I follows.
Hence, I and IV follow.
- 7. Statement: In one of the worst accidents in railway level crossing, fifty people died when a bus carrying them collided on to a running train.
Courses of Action:
- The train driver should immediately be suspended.
- The driver of the bus should be tried in court for negligence on his part.
- The railway authority should be asked to man all its level crossings.
Options- A. None follows
- B. Only I and II follow
- C. Only III follows
- D. Only II and III follow
- E. None of these Discuss
Correct Answer: Only III follows
Explanation:
The problem discussed in the statement is not regarding the current accident, but to do something to avert such mishaps. Accidents at railway crossings can be averted by deploying men to regulate traffic and installing barriers to check traffic movement when a train passes by. So, only III follows.- 8. Statement: "We must introduce objective type tests to improve our examinations for admission to MBA." - The Chairman of the Admission Committee tells the Committee.
Assumptions:
- The admission at present is directly through the interview.
- The Admission Committee is desirous of improving the admission examinations.
- The Chairman himself is an MBA.
Options- A. Only I and III are implicit
- B. Only II is implicit
- C. Only I and II are implicit
- D. Only I is implicit
- E. None is implicit Discuss
Correct Answer: Only II is implicit
Explanation:
Nothing about the present method of admission or the qualification of the Chairman is mentioned in the statement. So, neither I nor III is implicit. Assumption II directly follows from the statement. So, II is implicit.- 9. Statement: Should the parliamentary elections in India be held every three years as against five years at present?
Arguments:
- No. This will enhance wastage of money and resources.
- Yes. This will help the voters to change non-performing representatives without much delay.
- No. The elected representatives will not have enough time to settle and concentrate on developmental activities.
Options- A. None is strong
- B. Only I and II are strong
- C. Only II and III are strong
- D. Only I and III are strong
- E. All are strong Discuss
Correct Answer: Only I and III are strong
Explanation:
The election process entails exorbitant expenditure. So, holding elections very often will surely lead to wastage of money and resources. Thus, I holds strong. Also, the elected representatives need a considerable period of time to implement their policies and also convince the voters of their working. So, III holds strong while II does not.- 10. Statement: The national air carrier has decided to start a weekly air service from town A to town B.
Assumptions:
- There will be enough passengers to make the operation economically viable.
- Other carriers may not start such service.
- The people staying around these towns can afford the cost of air travel.
Options- A. Only I is implicit
- B. Only I and II are implicit
- C. Only II and III are implicit
- D. All are implicit
- E. None of these Discuss
Correct Answer: None of these
Explanation:
The firm has decided to start the air service. This implies that there are enough passengers and people in towns A and B can afford to travel by air. So, I and III are implicit. Assumption II is vague and so it is not implicit.
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