SSC CGL Reasoning · Study & Practice

Syllogism

AreaLogical & Deductive DifficultyModerate SSC weightage2–4 questions (Tier 1 & 2)

Syllogism gives you statements ('All A are B', 'Some B are C') and asks which conclusions necessarily follow. The single rule that makes this reliable: draw the smallest Venn diagram that satisfies all statements, then accept a conclusion only if it holds in EVERY possible diagram. If even one valid arrangement breaks the conclusion, it does not follow. Train yourself to look for the counter-case, not the confirming one.

Topics

1 Basic Syllogism (All / Some / No) 4 worked · 5 practice · 8-Q test Start → 2 Venn Method for Syllogism 4 worked · 5 practice · 8-Q test Start → 3 Possibility Cases 4 worked · 5 practice · 8-Q test Start → 4 Either–Or Cases 4 worked · 5 practice · 8-Q test Start →

⚡ SSC shortcuts & speed methods

The fastest ways to crack this chapter under time pressure — the techniques that separate a 95+ percentiler from the rest.

  • Place universal (All/No) statements first; they fix the diagram.
  • A definite conclusion must hold in EVERY diagram — hunt for a counter-case.
  • A possibility needs only ONE diagram where it is true.
  • "All A are B" always allows "Some B are A" (conversion).
  • Complementary pair that neither follows alone ⇒ "Either I or II".

⚠️ Common mistakes & traps

SSC is designed so that careless errors here cost you marks. Internalise each trap before the exam.

  • Drawing only the diagram that confirms the conclusion.
  • Treating "Some A are B" as forcing "All A are B".
  • Concluding "Some A are C" from two separate "Some" overlaps.
  • Missing an either-or when neither conclusion follows alone.

📈 SSC exam insight & PYQ analysis

SSC asks 2-statement, 2-conclusion items in Tier 1 and 3-statement sets with possibility/either-or in Tier 2. The Venn counter-case method handles all of them.

🎴 Flashcards — instant recall

Tap a card to reveal the answer. Drill these until they are automatic.

A definite conclusion is true when?Tap to reveal
It holds in every valid diagram
A possibility is true when?Tap to reveal
At least one diagram makes it true
All A are B ⇒ ? (conversion)Tap to reveal
Some B are A
Two "Some" overlaps ⇒ Some A are C?Tap to reveal
No, does not follow
Complementary pair, neither alone ⇒Tap to reveal
Either I or II follows

📌 Quick revision

Syllogism is settled by Venn diagrams. Fix universals first, then test each conclusion: definite conclusions must survive every legal diagram, possibilities need just one. Use conversion of "All", spot complementary pairs for either-or, and never trust a single confirming picture.

Chapter test

📝 Syllogism — Chapter Test
25 fresh questions · timed · full solutions
Start chapter test →
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🏆 Vidaara SSC success checklist

You have truly mastered Syllogism when you can tick every box below.

  • Recall every formula in this chapter without looking them up
  • Solve each topic’s practice set with at least 80% accuracy
  • Use the chapter shortcuts to cut your solving time in half
  • Spot and avoid every common trap listed above
  • Score 80%+ on the timed chapter test

📋 Chapter mastery scorecard

Track where you stand. Aim for the target before moving to the next chapter.

Skill checkpointTarget
Concept theory & formulas understood100%
Topic practice sets attempted (4 topics)4/4
Best topic-test score— → 80%+
Chapter test score— → 80%+
Flashcards drilled to instant recall5 cards