Logical Reasoning Questions for CLAT | QB Set 100

A university research committee is reviewing participation patterns across different academic groups. The committee notes that all law students are members of at least one academic society. It also finds that all members of the Debate Society are law students. However, no student who is a member of the Environmental Action Club is a member of the Debate Society.

Among the students surveyed, some law students are members of the Moot Court Society, and some Moot Court Society members are also members of the Environmental Action Club. The report further states that all Environmental Action Club members participate in community service activities. Additionally, some community service participants are not law students.

The committee also observes that all Debate Society members participate in public speaking competitions, while no Environmental Action Club member participates in those competitions. Finally, some academic society members are not part of either the Debate Society or the Environmental Action Club, indicating that students often engage in a wide variety of extracurricular activities beyond these organisations.

Based on the information above, answer the following questions.

Question 1

Which of the following conclusions definitely follows?

A. All law students are members of the Debate Society.
B. Some Environmental Action Club members are Debate Society members.
C. No law student is a member of the Environmental Action Club.
D. Some law students are members of the Environmental Action Club.

Question 2

Which of the following must be true?

A. All community service participants are Environmental Action Club members.
B. No Debate Society member is an Environmental Action Club member.
C. Some Debate Society members are Environmental Action Club members.
D. All law students participate in public speaking competitions.

Question 3

If a student is a member of the Debate Society, which of the following can be validly concluded?

A. The student is a member of the Environmental Action Club.
B. The student is not a member of any academic society.
C. The student is a law student and participates in public speaking competitions.
D. The student participates in community service activities.

Question 4

Which statement is definitely true?

A. Some community service participants are not law students.
B. All community service participants are law students.
C. No law student participates in community service activities.
D. All Moot Court Society members are Environmental Action Club members.

Question 5

Which of the following conclusions logically follows from the passage?

A. Some academic society members are neither Debate Society members nor Environmental Action Club members.
B. All academic society members belong to either the Debate Society or the Environmental Action Club.
C. Some Debate Society members are Environmental Action Club members.
D. No law student is a member of any academic society.

Answers and Detailed Explanations

1. Answer: D

We know:

• Some law students are members of the Moot Court Society.
• Some Moot Court Society members are also members of the Environmental Action Club.

Therefore, at least some individuals can be both law students and Environmental Action Club members.

• A does not follow because only Debate Society members are law students, not vice versa.
• B is impossible because no Environmental Action Club member is a Debate Society member.
• C is incorrect because the passage never states that no law student can join the Environmental Action Club.

Hence, D follows.

2. Answer: B

The passage explicitly states:

• No Environmental Action Club member is a Debate Society member.

This directly means:

• No Debate Society member is an Environmental Action Club member.

Checking other options:

• A reverses the given statement and is not valid.
• C directly contradicts the passage.
• D is not stated; only Debate Society members are guaranteed to participate in public speaking competitions.

Therefore, B must be true.

3. Answer: C

Given:

• All Debate Society members are law students.
• All Debate Society members participate in public speaking competitions.

Therefore, if someone is a Debate Society member, both conclusions follow.

• A is impossible because Debate Society and Environmental Action Club memberships do not overlap.
• B contradicts the fact that Debate Society members are academic society members.
• D is not supported.

Thus, C is correct.

4. Answer: A

The passage clearly states:

• Some community service participants are not law students.

Therefore, A is definitely true.

• B contradicts the above statement.
• C is incorrect because Environmental Action Club members participate in community service and some of them may be law students.
• D is not stated; only some Moot Court members belong to the Environmental Action Club.

Hence, A is correct.

5. Answer: A

The final paragraph states:

• Some academic society members are not part of either the Debate Society or the Environmental Action Club.

This is exactly what option A says.

• B contradicts the passage.
• C contradicts the statement that no Environmental Action Club member is a Debate Society member.
• D contradicts the statement that all law students belong to at least one academic society.

Therefore, A is the correct answer.

Answer Sequence:

D, B, C, A, A ✅