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1?
EDIT: no...that's not it...
EDIT: no...that's not it...
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2Originally posted by Jaguar Warrior
OK its been ten minutes so I'll go ahead and post one. SD should still post something, though, so I have something to solve.
square root(x+sqrt(x+sqrt(x+sqrt...)))=2
find x
If someone could make a neater version it would be appreciated. I don't know how.
Hint: the answer is not messy.One day Canada will rule the world, and then we'll all be sorry.Comment
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Five suspects were rounded up in connection with a robbery. Their statements were as follows:
Alex: "Chris and Dave are lying."
Brad: "Alex and Eric are lying."
Chris: "Brad and Dave are lying."
Dave: "Chris and Eric are lying."
Eric: "Alex and Brad are lying."
Who is the only suspect you know with certainty to be lying?One day Canada will rule the world, and then we'll all be sorry.Comment
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Yep. Did you guess? Or did you square both sides and substitute?"You're the biggest user of hindsight that I've ever known. Your favorite team, in any sport, is the one that just won. If you were a woman, you'd likely be a slut." - Slowwhand, to Imran
Eschewing silly games since December 4, 2005Comment
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Given that its an infinite series the figure inside each of the SQRT() must be equal to x. Therefore x = SQRT() = 2Originally posted by Jaguar Warrior
Yep. Did you guess? Or did you square both sides and substitute?One day Canada will rule the world, and then we'll all be sorry.Comment
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More accurately..
square root(x+sqrt(x+sqrt(x+sqrt...)))= A
x = A * (A-1)
.. = 2 *1
.. = 2One day Canada will rule the world, and then we'll all be sorry.Comment
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v is not right. p should be in a unit like m3/s. Divide that by s, which should be in metres, gives a unit in m2/s, which isn't speed.Originally posted by Ignorance
r = rate of falling snow (unknown)
ts = when snow has started falling (which we want)
p = plows constant rate of removing snow (unknown)
snow depth at time t: s = r*(t-ts)
speed of plow: v = p/s
which gives us v = p/(r*(t-ts))(\__/) 07/07/1937 - Never forget
(='.'=) "Claims demand evidence; extraordinary claims demand extraordinary evidence." -- Carl Sagan
(")_(") "Starting the fire from within."Comment
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Alex is lying"mono has crazy flow and can rhyme words that shouldn't, like Eminem"
Drake Tungsten
"get contacts, get a haircut, get better clothes, and lose some weight"
Albert SpeerComment
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If alex is telling the truth, then dave is lying. If dave is lying then chris must be telling the truth. However, alex already said that chris was lying. Therefore alex must be a certain LIAR!"mono has crazy flow and can rhyme words that shouldn't, like Eminem"
Drake Tungsten
"get contacts, get a haircut, get better clothes, and lose some weight"
Albert SpeerComment
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Not necessarily. Just because Dave is lying doesn't mean Chris isn't lying.(\__/) 07/07/1937 - Never forget
(='.'=) "Claims demand evidence; extraordinary claims demand extraordinary evidence." -- Carl Sagan
(")_(") "Starting the fire from within."Comment
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Right answer, wrong reasoning.Originally posted by monolith94
If alex is telling the truth, then dave is lying. If dave is lying then chris must be telling the truth. However, alex already said that chris was lying. Therefore alex must be a certain LIAR!One day Canada will rule the world, and then we'll all be sorry.Comment
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Alex is lying.Originally posted by Sagacious Dolphin
Five suspects were rounded up in connection with a robbery. Their statements were as follows:
Alex: "Chris and Dave are lying."
Brad: "Alex and Eric are lying."
Chris: "Brad and Dave are lying."
Dave: "Chris and Eric are lying."
Eric: "Alex and Brad are lying."
Who is the only suspect you know with certainty to be lying?
Let us assume he is telling the truth. Then Chris and Dave are lying.
Chris lying -> one of Brad or Dave must be telling the truth, but we have already said that Dave is lying, so Brad must be telling the truth.
But Brad claims Alex is lying!
Therfore we have a logical contradiction, so Alex must be lying.Comment
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Incidentally I would have done this by writingOriginally posted by Sagacious Dolphin
More accurately..
square root(x+sqrt(x+sqrt(x+sqrt...)))= A
x = A * (A-1)
.. = 2 *1
.. = 2
A= sqrt(x+sqrt(x+sqrt...))=sqrt(x+A)
So
A^2=x+A
x=A^2-A=4-2=2Comment
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I'll post another...easier one.
A hotel has 1,000 rooms numbered 1 to 1,000. Jack is looking after the hotel for the winter and is going slightly crazy. He decides to flick every roomlight switch in the hotel. He then decides to flick the switch in every other room (starting with room 2). He then flicks the switch in every third room (starting with room three). He then flicks the switch in every fourth room (starting in room 4).
If all lights were originally off, which lights remain on once Jack has finished switching every 1,000th roomlight switch?One day Canada will rule the world, and then we'll all be sorry.Comment
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Oops you got it right whilst I was composing another. Well done.
Can you also proove that you can't determine if the others are lying?One day Canada will rule the world, and then we'll all be sorry.Comment
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