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Mensa IQ Deductive Reasoning Puzzles Flashcards

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

Read the first 7 Mensa IQ Deductive Reasoning Puzzles flashcards as text

  1. All roses are flowers. Some flowers fade quickly. Therefore, which conclusion is valid?

    Answer: No valid conclusion can be drawn

    The 'some flowers' that fade quickly may or may not include any roses, so nothing certain follows about roses.

  2. If no cats are dogs and all tigers are cats, what must be true?

    Answer: No tigers are dogs

    Since tigers fall entirely within cats and cats share nothing with dogs, tigers share nothing with dogs.

  3. Tom is taller than Sara. Sara is taller than Mike. Mike is taller than Joe. Who is shortest?

    Answer: Joe

    The chain descends Tom > Sara > Mike > Joe, making Joe the shortest.

  4. Every member of the club pays dues. Raj does not pay dues. Therefore:

    Answer: Raj is not a member

    If all members pay dues and Raj does not, Raj cannot be a member.

  5. Some students are athletes. All athletes are healthy. Which follows?

    Answer: Some students are healthy

    The students who are athletes must be healthy, so at least some students are healthy.

  6. If it rains, the match is cancelled. The match was not cancelled. What can be concluded?

    Answer: It did not rain

    By modus tollens, since rain guarantees cancellation and there was no cancellation, it did not rain.

  7. No reptiles are mammals. Some pets are reptiles. Therefore:

    Answer: Some pets are not mammals

    The pets that are reptiles cannot be mammals, so some pets are not mammals.