Card Hypothesis

FACT: Each card has a number on one side and a letter on the other.
HYPOTHESIS: Every card that has a vowel on one side has an even number on its opposite side.
THE TEST: Which card or cards must you turn over in order to test the Hypothesis?

card-puzzle1

Type your answer in the Reply field below and Save.
The 15 possible answers are:

All four cards: A B C D
Three cards: A B C / A B D / A C D / B C D
Just two cards: A and B / A and C / A and D / B and C / B and D / C and D
Just one card: Card A only / Card B only / Card C only / Card D only

About davidbdale

Inventor of and sole practitioner of 299-word Very Short Novels. www.davidbdale.wordpress.com
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31 Responses to Card Hypothesis

  1. oaktree1234 says:

    all four

    Like

  2. bigblue821 says:

    ABCD

    Like

  3. runnerd4 says:

    ABCD to be sure that it is correct for all cards

    Like

  4. rowanstudent24 says:

    You have to turn over 2 cards. Card A and Card C because card A has a vowel on it and Card C has an even number on it.

    Like

  5. jeffbezos123 says:

    In order the hypothesis you would need to turn over all for cards. This is because you want to see all of your possible outcomes. This is because when you are testing a theory you want to try and prove it wrong or prove it right

    Like

  6. clementine102 says:

    I think you just have to flip card C because the hypothesis is only asking for a card that has an even number. The card that defiantly has an even number is card C. The hypothesis will be correct is card C has a vowel on the other side.

    Like

  7. thecommoncase says:

    In order to test the hypothesis you must turn over all four cards because in order to prove the vowels and even numbers are on the same card and the consonants go with the odd numbers.

    Like

  8. shadowswife says:

    Turn over both cards A and C.

    Like

  9. cfriery says:

    You must turn over two cards, which are cards A and C because our hypothesis is only testing for vowels and even numbers.

    Like

  10. Nimadhury says:

    I believe just flipping C will be enough to test the hypothesis. This is because we’re only concerned about vowel/even number cards.

    Like

  11. cucumberlemonadee says:

    All four cards

    Like

  12. hailthegreat8 says:

    A and C

    Like

  13. tcarter101 says:

    A B C D

    Like

  14. pardonmyfrench13 says:

    Turn over both A and C.

    Like

  15. gooferious says:

    All 4 cards

    Like

  16. comicdub says:

    Just two cards: A and C

    Like

  17. dayzur says:

    All four cards

    Like

  18. pizzaplanet323 says:

    A B C D

    Like

  19. l8tersk8ter says:

    All four – ABCD, if you flip over A and C and they happen to have a vowel and even number, that doesn’t mean the other cards can’t have a mismatch odd number and vowel or even number and consonant

    Like

  20. gabythefujoshi18 says:

    Turn over card A and C, because card A is a vowel and card C is an even number

    Like

  21. rowanstudent says:

    I would say turn over the one vowel because that is what ur hypothesis states.

    Like

  22. mhmokaysure says:

    A and C. By turning over both A and C you can see if both vowels have even numbers, seeing as the hypothesis is testing vowels against even numbers.

    Like

  23. ivellisemorales says:

    Flip c and b

    Like

  24. corinnebuck1219 says:

    turn over card A and card C

    Like

  25. bluntwriting88 says:

    We only need to turn over card A and Card D to test the hypothesis. This is because a Vowel will have an even number on its opposite side if-and-only-if the hypothesis is true. If we turn over the 3, this will either verify or invalidate our hypothesis. This is also the case if we Turn over the E card.

    Like

  26. mesrurerowan says:

    Turn over all four

    Like

  27. wafflesrgud22 says:

    turn a and c

    Like

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