I should have..... :-(
And I should have used spoiler tags. I'll go back and edit.
Friday OT #3- Logic Test
- Thread starter Mr Janny
- Start date
I should have..... :-(
And I should have used spoiler tags. I'll go back and edit.
- Mar 27, 2006
- 43,012
- 34,521
- 113
The correct answer is E and 9. Here's why:
The cards we're looking to flip are the ones that can prove the rule false, rather than confirm it.
E fits this criteria because if we flip it, and it's an odd number, the rule is false.
D doesn't because the rule is not proved true or false regardless of if the number is even or odd. Neither outcome breaks the rule, so we wouldn't need to flip it.
4 is trickier, but it's the same as D. The rule only says that vowel cards have even numbers on the other side. It doesn't say that the reverse is true, so regardless of what letter is on the other side of the 4, it won't break the rule.
And we want to flip 9, because if the 9 flips to a vowel, we know the rule is false, since the rule tells us that all vowel cards flip to even numbers.
Supposedly, the success rate for this test, originally conceived in 1963 is only about 4%. I'd guess we're a little higher here on CF.
The cards we're looking to flip are the ones that can prove the rule false, rather than confirm it.
E fits this criteria because if we flip it, and it's an odd number, the rule is false.
D doesn't because the rule is not proved true or false regardless of if the number is even or odd. Neither outcome breaks the rule, so we wouldn't need to flip it.
4 is trickier, but it's the same as D. The rule only says that vowel cards have even numbers on the other side. It doesn't say that the reverse is true, so regardless of what letter is on the other side of the 4, it won't break the rule.
And we want to flip 9, because if the 9 flips to a vowel, we know the rule is false, since the rule tells us that all vowel cards flip to even numbers.
Supposedly, the success rate for this test, originally conceived in 1963 is only about 4%. I'd guess we're a little higher here on CF.
No.
There is ONLY one rule and that is that there's an even number on the opposite side of a vowel. There are no other rules to the contrary stating that an even number must have a vowel.
But if you flip the 9 over and there is a vowel on the other side then it proves that rule false
If there is a vowel on the back of the 9 then that vowel does not have an even number on its opposite side
The rule says nothing about "face-up cards only." It refers to "other sides," so it could apply to face-up or face-down cards.
- Mar 27, 2006
- 43,012
- 34,521
- 113
- Mar 27, 2006
- 43,012
- 34,521
- 113
Not true. If an odd number has a vowel on the other side, the rule is false, because it states that a card with a vowel on it, must have an even number on the other side.
- Mar 27, 2006
- 43,012
- 34,521
- 113
Here's another way of phrasing the same question that works better for the human brain.
Assume we have a similar deck of cards, but instead of numbers and letters on them, each card is a drink, and on the flip side is the age of the person drinking it. So, here's our rule: You have to be 21 to drink alcohol. Which of the following cards would you need to flip to prove that the rule is being followed.
Assume we have a similar deck of cards, but instead of numbers and letters on them, each card is a drink, and on the flip side is the age of the person drinking it. So, here's our rule: You have to be 21 to drink alcohol. Which of the following cards would you need to flip to prove that the rule is being followed.
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- Mar 27, 2006
- 43,012
- 34,521
- 113
Here's another way of phrasing the same question that works better for the human brain.
Assume we have a similar deck of cards, but instead of numbers and letters on them, each card is a drink, and on the flip side is the age of the person drinking it. So, here's our rule: You have to be 21 to drink alcohol. Which of the following cards would you need to flip to prove that the rule is being followed.
Whiskey, 16, and Beer.
Whiskey, 16 & BeerHere's another way of phrasing the same question that works better for the human brain.
Assume we have a similar deck of cards, but instead of numbers and letters on them, each card is a drink, and on the flip side is the age of the person drinking it. So, here's our rule: You have to be 21 to drink alcohol. Which of the following cards would you need to flip to prove that the rule is being followed.
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.
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)
E and 9
Depends. You haven't told us if the cards are unique...(no number or letter is repeated). If they are unique, you would have to turn over all four to be certain.
