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
This entry was posted in davidbdale, Riddles. Bookmark the permalink.

14 Responses to Card Hypothesis

  1. chavanillo says:

    I most turn over card A and card C. E is a vowel and 2 is a even number so card A is E and Card C is 2.

  2. wazoo1234 says:

    A B C D

  3. pomegranate4800 says:

    Two cards, A and C, because they each are a card with a present vowel or even number, which will easily prove if the hypothesis is true or not.

  4. nina525 says:

    Card A and C to test one of the number cards and one of the cards with a letter on it

  5. nyaj32 says:

    Turn over card A and C. A has a vowel on one side so we have to check if it has an even number on the there side. C has an even number so we have to turn it over to see if it has a vowel on the other side. B and D are irrelevant because they do not have the vowel/even number to start.

  6. jets1313 says:

    Must turn over card c because thats the only card with an even number. And in oder to test your hypothesis that card needs to be flipped

  7. g903254 says:

    A and C would fully conclude for those cards that an even number has a vowel or a vowel has a even number. If either card does not fit the hypothesis then the hypothesis is false.

  8. biggarz7 says:

    All four cards (A B C D) because the hypothesis is not true so we do not know if an odd numbered card has a vowel or not.

  9. daphneblake25 says:

    I think you have to turn over Card A and Card C because the hypothesis only states something about even numbers and vowels, not odd numbers and consonants. So since we’re only proving that if you turn over a vowel, you get an even number, to test that, you would have to turn over Card A, which has a vowel, and Card C which has an even number to see if the hypothesis is correct.

  10. rowanstudent2 says:

    Card A only because the hypothesis says that every card with a vowel on one side has an even number on its opposite side. Also, it says test the hypothesis not prove that hypothesis.

  11. nj908 says:

    Card A and card C

  12. MysteryLimbo says:

    Card A & C would need to be flipped to test the hypothesis.

  13. mysterylimbo says:

    Card A B C D would need to be flipped to test the hypothesis.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s