APPSC Group II · Bite-size lessons
Logical and Analytical Reasoning
About 5 min · General Studies and Mental Ability · English
Time worked out from the lesson's 255 words at 150 words a minute, plus a minute for each question.
This section tests your ability to think systematically, identify patterns, and draw valid conclusions from given information—skills essential for administrative roles.
Key ideas
- Syllogisms operate on categorical propositions: All/Some/No statements follow fixed rules. "All A are B" does not mean "All B are A." Venn diagrams make validity visual and reduce errors.
- Statements and Conclusions require strict logic: A conclusion follows only if it is 100% logically necessary from the statements. Probable or common-sense conclusions are traps.
- Assumptions are unstated but necessary beliefs: The argument falls apart without the assumption. Test by negating—if negation destroys the argument, the assumption is valid.
- Series problems follow mathematical or positional patterns: Look for addition, multiplication, squares, cubes, alternating operations, or position-based rules in letter/number series.
- Blood relations map to a family tree: Always draw the tree. Males and females get distinct symbols. Work from known relationships outward.
Quick reference
- Syllogisms: Two negative premises or two particular premises = No valid conclusion.
- Opposite letters in alphabet: Sum = 27 (A+Z, B+Y, etc.).
- Direction right turns: N→E→S→W→N (clockwise).
- Blood relations: Always draw the family tree before answering.
- Assumptions: Negate and check—if argument collapses, assumption is correct.
Check yourself: 3 questions
1. In a certain code language, 'COMPUTER' is written as 'DPNQVUFS'. How will 'PROGRAM' be written in that code?
2. In a certain code language, RIVER is written as SJWFS. How will OCEAN be written in the same code?
3. In a certain code language, 'RIVER' is written as 'SJWFS'. How will 'OCEAN' be written in the same code?
This lesson is cut from the topic's note, not rewritten. Fact-checked on 17 Oct 2026: an AI-assisted check of this note against cited sources; the errors it found were corrected that day. Some errors may remain. The questions are from Shishya's validated question bank.
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