ok, now i don't get it.
if you do:
7*(3+3/7) = 24 arn't you using decimels?
3/7 = 0.428571428571428571428
+3 = 3.28571428571428571428
i mean even though the answer is an int your working with (using) decimels. no?
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ok, now i don't get it.
if you do:
7*(3+3/7) = 24 arn't you using decimels?
3/7 = 0.428571428571428571428
+3 = 3.28571428571428571428
i mean even though the answer is an int your working with (using) decimels. no?
Tedob: You're right... it is using decimals, but I think when he said that you can't use decimals, he meant that the solution must not contain any decimals. Typing the equation into a calculator (for example) using all of the correct parenthesis and such will never display a decimal. The reason I think he said no decimals was so that you don't do what you tried, which was truncating the decimal off of the final answer to get the correct answer. Also, 3/7 is not necessarily a decimal... it's a rational, which is considered a number. It's true that if you divide 3 by 7, you will receive a decimal, but I always learned to leave everything in rational form so as to not lose accuracy by rounding a decimal.
AJ
there's a few solutions to this, here's the one I came up with.
talk to one of the guys ask the guy who is more likely to tell the truth out of the two of those guys.
If the answer is yes/no you have the random guy. If he's the random guy move to the next guy and ask him if the guy which you know is the random guy is the guy who always tells the truth if the answer is yes he's the lyer and move to the truth tell and ask him who has the key if he says no to the question he's the truth teller and then ask him who has the key.
If the answer to the first question comes up as 1 of the two guys, both the consistent lyer and the consistent truth teller will have chosen the random guy because he has a better chance of telling the truth than the constent lyer and is less likely to tell the truth than the constent truth teller. so ask the guy again if they guy he said was the truth teller if the answer is yes than move to the guy that the original guy didn't say and ask him who has the key, if the answer is no than ask the original guy who has the key.
hrmmm, I guess your right you'd need a question if you actually wanted them to give you the key, don't worry I'll get better at this whole proposing questions in a clearer manner thing.
For people who may want an explanation (I could go into a long, logic-based discussion) I found a link which may show how it was done...
http://rinkworks.com/brainfood/s/wd.39.shtml
My answer (which I didn't post because it wasn't what I thought he was looking for) is very similar to this, though I had slightly different questions and a table I created was centered around different propositions.
AJ
sorry for the confusion
Problem #1 and #2 are trivial, hence I'm going to ignore them...
But #3 seems to be stumping people...
Since 3/7 is a decimal, I'm assuming this is "illegal" as per "the rules," but...Quote:
7*(3+3/7) = 7(21/7 + 3/7) = 7(24/7) = 24
Actually 77 - 3/6 = 76.5Quote:
Originally posted here by Tedob1
77 - 3 / 6 =24.66666666666666666
but we're not using decimals so 77 - 3 / 6 =24
But I think you meant (77-3)/6 which actually is close6 to 12 (74/6 which is 12 1/3 or 12.333333)
I'll have to wake up a little bit and glance at this again - my solution seems to have gone for a walk around the building or something since I first started reading this thread...
3/7 isn't a decimal it's a fraction, and 7(3/7) eliminates it before it becomes a decimal.