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More ways to get Braingle...

Follow the Rules!

Logic puzzles require you to think. You will have to be logical in your reasoning.

 

Puzzle ID:#40706
Fun:** (2)
Difficulty:*** (2.14)
Category:Logic
Submitted By:kratsgus***

 

 

 



You have four cards on the table:

[ BRAIN ] [ strain ] [ MIND ] [ teaser ]

You know that each card has capitalized letters on one side and lowercase letters on the other. There is a rule that says, "If a card has 'BRAIN' on one side, it must have 'strain' on the other."

Which card(s) must be turned over to make sure that the rule was not violated?



Answer

Two cards: [ BRAIN ] and [ teaser ].

Let's examine this card by card...

[ BRAIN ] - this must have [ strain ] on the other side or else we would violate the rule, therefore we must turn this card over.

[ strain ] - this "can" have but doesn't require [ BRAIN ] on the other side. If it does, the rule is not violated. If it doesn't, the rule is still not violated. Therefore, we do not need to turn this card over.

[ MIND ] - will not violate the rule since it was stated that lowercase must be on the other side of this card. We do not need to turn this over.

[ teaser ] - this can violate the rule. First situation is not having [ BRAIN ] on the other side which does not violate the rule. Second situation is having [ BRAIN ] on the other side which DOES violate the rule. Therefore, we need to turn this one over too.

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