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Formal Reasoning (Posted on 2004-12-15) Difficulty: 2 of 5
I present to you a deck of 4 cards. Each card has on one side a letter of the alphabet, and on the other side a single digit from 0-9.

I propose a hypothesis that may apply to this deck:
If the letter is 'E', then the number on the other side is '4'.

I then drop the 4 cards on the table, and you see: 'B', '7', 'E', '4' (on the respective cards).

Which of the 4 cards must you turn over to verify or disprove my hypothesis?

See The Solution Submitted by SilverKnight    
Rating: 3.0000 (22 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
answer | Comment 31 of 60 |
it says that he drops the cards on the table and u see b,7,e,and 4. it says that it MAY be in the deck as e on one side and 4 on the other.so if you see both of them oviosly they cant be on the same card so u dont have to turn any of them over
  Posted by jenni on 2004-12-27 23:16:56
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