Practice Test GeeksGCAT - General Cognitive Ability Test Practice Test
← All GCAT Flashcard Decks

Syllogistic Reasoning Flashcards

7 cards from real GCAT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Syllogistic Reasoning flashcards as text

  1. No mammals lay eggs. Platypuses lay eggs. What must follow?

    Answer: Platypuses are not mammals.

    By contrapositive, if something lays eggs it cannot be a mammal.

  2. All optimists are happy. All happy people sleep well. Some night-shift workers do not sleep well. Which follows?

    Answer: Some night-shift workers are not optimists.

    Optimists → happy → sleep well; those who don't sleep well are not happy, hence not optimists — applying to the night-shift workers who don't sleep well.

  3. All P are Q. No R are Q. Some S are R. Which is valid?

    Answer: Some S are not Q.

    The S that are R are not Q (since no R are Q), so at least some S are not Q.

  4. Some teachers are strict. All strict people demand discipline. Which must be true?

    Answer: Some teachers demand discipline.

    Strict teachers must demand discipline, so at least some teachers demand discipline.

  5. All carnivores eat meat. This creature does not eat meat. Which conclusion is valid?

    Answer: This creature is not a carnivore.

    Contrapositive of 'all carnivores eat meat' is 'not eating meat means not a carnivore.'

  6. No politicians are honest. Some honest people are brave. Which is valid?

    Answer: Some brave people are not politicians.

    Honest people are brave (some of them), and honest people are not politicians, so those brave honest people are not politicians.

  7. All valid arguments have true conclusions. This argument has a false conclusion. What follows?

    Answer: This argument is not valid.

    By contrapositive, a false conclusion means the argument is not valid.