Reasoning Ability

Syllogism — Free Practice Questions

Conclusions from Some/All/None statements, including reverse syllogism.

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Sample questions

Try 3 sample Syllogism questions

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Q1 · easy

Statements: All books are pens. All pens are erasers. Conclusions: I. All books are erasers. II. Some erasers are books.

  1. AOnly I follows
  2. BOnly II follows
  3. CBoth follow
  4. DNeither follows
Explanation

All books → pens → erasers, so all books are erasers (I follows). Since all books are erasers, some erasers are books (II follows).

Q2 · medium

Statements: Some cats are dogs. No dog is a horse. Conclusions: I. Some cats are not horses. II. No cat is a horse.

  1. AOnly I follows
  2. BOnly II follows
  3. CBoth follow
  4. DNeither follows
Explanation

Some cats are dogs, and no dog is a horse → those cats (the dog-ones) are not horses. So I follows. II is too strong because other cats could still be horses.

Q3 · medium

Statements: All mangoes are fruits. Some fruits are sweet. Conclusions: I. All mangoes are sweet. II. Some mangoes may be sweet.

  1. AOnly II is a possibility that follows
  2. BOnly I follows
  3. CBoth follow
  4. DNeither follows
Explanation

I doesn't necessarily follow (sweet fruits may not include mangoes). II is a possibility because nothing rules it out.

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