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Conferences  The CTK Exchange Guest book |
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Discussion Topic |
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Last Updated Date/Author |
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Regarding "Rational Solutions to x^y = y^x"
Perhaps it is obvious to some, but ( (x+1) / x ) ^ x converges to e.
And same for ( (x + 1) / x ) ^ (x+1). %... |
nyric |
Apr-29-11 05:10 PM
by alexb |
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An odd generalisation of prime roots and chance
I left school a "Cut the Knot" kind of guy, Occam's razor states "Entia non sunt multiplicanda praeter necessitatem". It means the simples... |
Derren |
Mar-26-09 04:45 PM
by Derren |
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Three Concurrent Circles
Bill Millar
I have seen several three-circle theorems on CTK, but not this one. I came across it by generalising an unpublished result of Brian S... |
billmillar |
Oct-28-08 12:26 PM
by billmillar |
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Circles through the Orthocenter
Dear Alex,
I suggest one another proof for:
http://www.cut-the-knot.org/Curriculum/Geometry/CirclesThroughOrthocenter.shtml
%... |
Bui Quang Tuan |
Sep-09-08 09:08 AM
by alexb |
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Triangles With Equal Area
Dear Alex,
I suggest one another proof for "Triangles With Equal Area":
http://www.cut-the-knot.org/Curriculum/Geometry/Equ... |
Bui Quang Tuan |
Aug-26-08 07:20 PM
by alexb |
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Mistake on the page (an aside, Bertrand's Paradox)
Dear Alexander,
I found a mistake in your thoughts in the subject Bertrand's Paradox, an Aside.(http://www.cut-the-knot.org/bertrand... |
Max  |
Feb-28-08 10:28 AM
by bole79 |
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buying the site contents for offline use
I visited this site after a coupel of years again. That time (I think in (2002), the site contents were available to buy on CD for offline vie... |
dks |
Feb-13-08 03:39 PM
by alexb |
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Twelve Balls puzzle
we have twelve balls, one old style two pane weighing balance , one marker pen .
eleven are perfect by weight , one is defective either heavy... |
kapilkim |
Feb-06-08 07:54 AM
by alexb |
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Another Equal Area Triangles
Dear Alex and All,
Please look at interesting fact of two equal area triangles in parpolygon in the page:
http://www.cut-the-knot.org/... |
Bui Quang Tuan |
Oct-31-07 08:55 AM
by alexb |
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A challenging puzzle involving an isosceles triangle.
ABC is an isosceles triangle with vertex angle /_BAC = 20 degrees and AB = AC. Draw /_BCD = 60 degrees ; D lying on AB.
Draw an arc wit... |
sarathian |
Oct-03-07 03:16 PM
by alexb |
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Algorithm
Please give me the algorithm to test whether the numbers represent the sides of a right angle triangle.... |
Hemanth Kumar |
Sep-15-07 07:26 AM
by sarathian |
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Scalene triangle angle to side relationships
Hello. If a scalene triangle has a base with known length and one side with a length of one third of the other, is there any relationship between ... |
Balf |
Jul-08-07 04:00 PM
by mpdlc |
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The CTK Exchange Forum
This site is great
E Taylor... |
KaraokeQueen312 |
Jun-14-07 06:53 PM
by KaraokeQueen312 |
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math is...
The reason why people don`t like math is becasue they don`t understand it and son`t get me wrong i am not a geek or anything but i mean like the... |
BakersGirl |
Jun-13-07 11:01 AM
by BakersGirl |
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This site is...
I like this site because...
1.its the closet thing to an e-mail address that my mom will let me have
2.it helped my pass the 7th grade.You don`... |
BakersGirl |
Jun-11-07 01:24 PM
by BakersGirl |
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puzzle trouble
OK my math teacher taught us a puzzle that is very difficult to crack.This is what its called,Gas,Water,Electric.Do you want to know how to play... |
BakersGirl |
Jun-11-07 01:24 PM
by BakersGirl |
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Members post to this forum
Due to an inordinate amount of spam (automated) posting to this forum it will now require membership verification to post here. Members and others... |
alexb |
May-09-07 12:44 PM
by SamIsTheBomb |
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this sight is cool
this site has many educational games that help students (like me) learn. by the way, it is my birthday. this site is awesome, and all you math... |
CrAzY TrAiN |
May-09-07 12:44 PM
by CrAzY TrAiN |
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Ptolemy's theorem - cannot figure out how to apply
I am a retired high school math teacher.
I am tutoring a student, but can't for the life of me know where to begin on this problem:
A ... |
Dovid |
Apr-09-07 02:48 PM
by mpdlc |
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infinity & probability
This is just a remark about
http://www.cut-the-knot.org/Probability/infinity.shtml
I agree that the individual probability for each ... |
eric derobert |
Nov-13-06 07:35 AM
by alexb |
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Response to Stephan Hradek riddle
It went like this "Someone was sentenced to death, but since the king loves riddles, he threw this guy into a room with two doors. One leading t... |
Merrovingian |
Oct-28-06 06:35 AM
by selene |
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Small problem...
Sorry for your time.... Why i can't see images on this resource?
My Browser is: Opera.
Thank you.
... |
Green_Monkey23 |
Oct-12-06 10:38 PM
by alexb |
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I struggle with maths but i want to love it.
im in 5th year of high school and i really want to love maths but i struggle with it. My grade arent really good, im failing senior maths and its ma... |
Edward Lwin |
Sep-20-06 10:30 PM
by Edward |
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Two Numbers Guessing Game trouble
This is such a great web site, I love it! Math "magic tricks" are a favorite of mine, but I am having trouble with the "Two Numbers Guess... |
SBoone |
Sep-14-06 08:56 AM
by alexb |
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Pell Equation
Lovely derivation. Interesting lattice. triangular meets square. ... |
Marcel Morisse |
Sep-09-06 08:17 AM
by Marcel Morisse |
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Hummer's Mind Reader applet doesn't work for me
Hi,
Found this site researching Bob Hummer's mathematical trick. Tried the applet (even with google pop up blocker disabled) and nothing wo... |
jmbauman |
Sep-07-06 06:30 PM
by alexb |
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Morley's theorem, Newman's proof
I was reading the proofs of Morley's theorem by various people. A reference has been made to an geometrical proof by Narayaniengar circa 1907. The n... |
Dr Iyengar |
Aug-24-06 02:43 PM
by alexb |
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Lebanon Israel conflict
What do you think about current event in the Near East?
How long will this conflict be lasting? Are you for or against Israel's position?%0... |
Bilbo |
Aug-05-06 04:45 PM
by fromlebanon |
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Another solution to 3 Jugs problem(with 6)
0 0 8
0 5 3
3 2 3
0 2 6
2 0 6
2 5 1
3 4 1
0 4 4
... |
frida18 |
Jul-26-06 11:04 PM
by frida18 |
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Another solution to geoprobability problem
The solution http://www.cut-the-knot.org/triangle/geoprobability.shtml uses the bary centric co-ordinates. I think it is easy to map the pos... |
Prasanna Meda |
Jul-24-06 03:40 PM
by alexb |
1
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