There is a deck of cards, each of which has a number on one side of the card and a letter on the other side. This fact is a given, and you can assume it is true. Four of these cards are dealt onto a table, showing the following face up:
Conjecture: "For these four cards, every card with an even number on one side has a vowel on the other."
Question: What is the smallest set of cards (list which ones) that must be turned over to test the conjecture?
Definitions: Vowel = a letter in the set {A, E, I, O, U}
Even Number is divisible by 2 without remainder,{...-4, -2, 0, 2, 4,...}
Test: An experiment that would refute (disprove) the conjecture, if the conjecture were false.
Pull down here to select None 1 2 A B 1 & 2 1 & A 1 & B 2 & A 2 & B A & B 1 & 2 & A 1 & 2 & B 1 & A & B 2 & A & B ALL FOUR: 1 & 2 & A & B
2. What is your age in years?
3. What is your gender?
Male Female
4. Education: What is your highest degree?
Less than 12 years of education Graduated 12 year high school degree 1 - 3 years of college College graduate (bachelor's diploma or degree) Master's degree (M.A., M.S., M.S.W., etc.) Doctor's degree (Dr., Ph.D., J.D., M.D., etc.)
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