Friday OT #3- Logic Test

Mr Janny

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Mar 27, 2006
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Some of you might have seen this one before as it's been around for 50+ years. It's a simple test to see how logical you are.

Here's how it works:
You have a set of cards in front of you. Each card is labeled with a number on one side and a letter on the other side. You are then given the rule that if a card has a vowel on one side, then it must have an even number on the other side. Four cards are then placed in front of you.

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Which card or cards do you have to turn over to determine whether or not the rule has been followed?

(Just post your answer, wait to post your reasoning until after we get a few responses)
 

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E and 9.

Make sure there is an even number behind the E, and make sure there isn't a vowel behind the 9.

There are no rules for constants in having only an odd or even number.
 
Last edited:
E
Based off of your rule that "if a card has a vowel on one side, then it must have an even number on the other side" the "E" is the only one that applies. The rule does not state the opposite that an "even number must have a vowel".
 
E
Based off of your rule that "if a card has a vowel on one side, then it must have an even number on the other side" the "E" is the only one that applies. The rule does not state the opposite that an "even number must have a vowel".
But you must make sure that there is not a vowel on the other side of the 9