minimum number of cards
There are four cards that have a letter on one side and a number on the other side. Someone has laid them out and the cards appear as
. There is a rule that a card with an odd number on one side must have a vowel on the other. What is the minimum number of cards you should turn over to prove the rule is true?
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1 solution
The minimum number of cards you should turn over is two. They are card 7 ( to see if the other side has a vowel) and G (to see if the the other side is an odd number).