Logical Reasoning

Overview

CSAT logical reasoning includes syllogisms, series, coding, arrangements, blood relations, directions and statement-based logic.

Key points

• Syllogisms: use Venn diagrams; accept only certain conclusions.
• Series: check differences, ratios, squares and alternate patterns.
• Arrangements: place fixed clues first, then branch.
• Directions: keep net (x, y) displacement.
• Blood relations: draw a family tree with generations.
• Statement–assumption: use the negation test.

Practice MCQs

1. From the perspective of definition and scope, which one of the following statements about Logical Reasoning is correct?

   1. If a conclusion sounds factually reasonable, it is valid even when it does not follow from the given premises.
   2. Logical Reasoning is unrelated to institutions, processes or real-world applications.
   3. Logical Reasoning has no exceptions or limitations in exam analysis.
   4. Translate conditions into symbols, tables or diagrams before solving.

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   Answer: (d) Translate conditions into symbols, tables or diagrams before solving.. Translate conditions into symbols, tables or diagrams before solving.

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2. Consider the following statements on Logical Reasoning, focusing on definition and scope: 1. Translate conditions into symbols, tables or diagrams before solving. 2. Elimination is often faster than constructing every possibility. Which of the statements given above is/are correct?

   1. 1 only
   2. 2 only
   3. Both 1 and 2
   4. Neither 1 nor 2

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   Answer: (c) Both 1 and 2. Both statements are correct.

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More topics in this chapter

• Comprehension
• Logical Quantitative Aptitude