Search found 27 matches
- Fri Mar 01, 2019 7:19 pm
- Forum: Countdown - Spoilers
- Topic: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
- Replies: 10
- Views: 5363
Re: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
Gavin Chipper: What is the official countdown dictionary? I thought it is the Oxford English Dictionary. There's different versions though. They use the online one but the subscription version so the free one is only an approximation. The word "tetragon" is in the printed version of the S...
- Thu Feb 28, 2019 5:25 pm
- Forum: Countdown - Spoilers
- Topic: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
- Replies: 10
- Views: 5363
Re: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
Gavin Chipper:
What is the official countdown dictionary?
I thought it is the Oxford English Dictionary.
What is the official countdown dictionary?
I thought it is the Oxford English Dictionary.
- Thu Feb 28, 2019 3:03 pm
- Forum: Countdown - Spoilers
- Topic: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
- Replies: 10
- Views: 5363
Re: Spoilers for Thursday 28th February 2019 (Series 80, Prelim 27)
The word "Tetragon" is in my Shorter OED (Fifth edition, 2002) and even in my Concise Oxford (Seventh, 1982).
I wonder why SD did not allow that word.
I wonder why SD did not allow that word.
- Sat Oct 13, 2018 9:43 pm
- Forum: Countdown - Spoilers
- Topic: Spoilers for Friday 12th October 2018 (Series 79, Prelim 76)
- Replies: 8
- Views: 6573
Re: Spoilers for Friday 12th October 2018 (Series 79, Prelim 76)
Susie did not allow the word "shapen". It is in my copy of the Shorter OED (5th edition, 2002) and many other dictionaries.
- Mon Sep 24, 2018 12:39 pm
- Forum: Countdown - General
- Topic: Impossible Rachel
- Replies: 20
- Views: 13096
Re: Impossible Rachel
Elliott Mellor:
There are so many tables in that article and which is the correct table? How do you know they are exact?
There are so many tables in that article and which is the correct table? How do you know they are exact?
- Mon Sep 24, 2018 6:32 am
- Forum: Countdown - General
- Topic: Impossible Rachel
- Replies: 20
- Views: 13096
Re: Impossible Rachel
My simulations indicate that the estimates of the number of impossible answers are: no big numbers: 16.97% one big number : 2.73% two big numbers: 1.92% three big numbers: 5.35% four big numbers: 10.19% Do these estimates look reasonable? If I want a solution then I would pick two big numbers.
- Wed Sep 12, 2018 12:13 pm
- Forum: Countdown - Spoilers
- Topic: Spoilers for Monday 10th September 2018 (Series 79, Prelim 53)
- Replies: 4
- Views: 3175
Re: Spoilers for Monday 10th September 2018 (Series 79, Prelim 53)
What is "Dan's method"?
- Thu Aug 23, 2018 6:24 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Then in this case they might be using different axioms, because by asking which numbers solutions in Countdown are identical, you're not formally defining it. Pedantically, you are correct. However, one has to start with a reasonable set of axioms/definitions to study equivalence between solutions....
- Thu Aug 23, 2018 6:21 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Then in this case they might be using different axioms, because by asking which numbers solutions in Countdown are identical, you're not formally defining it. Pedantically, you are correct. However, one has to start with a reasonable set of axioms/definitions to study equivalence between solutions....
- Wed Aug 22, 2018 7:28 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Gavin Chipper: Elliott Mellor: I am using the incoherency solver and it often gives more than one solution. My original question was whether the solution set is complete. If incoherency gives only one answer then my question is not a meaningful question in the first place. Mathematics is never cons...
- Wed Aug 22, 2018 2:18 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Gavin Chipper: Elliot Mellor: I am using the incoherency solver and it often gives more than one solution. My original question was whether the solution set is complete. If incoherency gives only one answer then my question is not a meaningful question in the first place. Mathematics is never consid...
- Wed Aug 22, 2018 11:45 am
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Elliott Mellor:
"More than 1. It will only ever give 1 solution regardless of whether there is 2 solutions or 200 solutions."
I do not understand your statement. I have seen up to six alternative solutions from the incoherency solver.
"More than 1. It will only ever give 1 solution regardless of whether there is 2 solutions or 200 solutions."
I do not understand your statement. I have seen up to six alternative solutions from the incoherency solver.
- Tue Aug 21, 2018 11:23 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Gavin Chipper: Thanks for the pointer to the "can of worms". I do not wish to re-open this "can of worms" but the equivalence problem is not exactly "rocket science"; any competent mathematician should be able to solve the problem. Going back to the incoherency solver, ...
- Tue Aug 21, 2018 10:34 pm
- Forum: Off-topic
- Topic: How often do you go to the toilet?
- Replies: 18
- Views: 10988
Re: How often do you go to the toilet?
To demonstrate your super-human qualities to the scientific world.
- Tue Aug 21, 2018 10:32 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
What Elliott Mellor says is a reasonable outcome from a good solver. However, it is not meaningful to equal "all possible solutions" to "the closest solution" as Owen Carroll has stated. Suppose that there are just four solutions (avoiding trivial equivalent solutions due to comm...
- Tue Aug 21, 2018 7:03 pm
- Forum: Off-topic
- Topic: How often do you go to the toilet?
- Replies: 18
- Views: 10988
Re: How often do you go to the toilet?
Perhaps, you should see a doctor.
- Tue Aug 21, 2018 6:59 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Owen Carroll:
Why are you so certain that the incoherency solver gives all possible solutions to a given problem? I presume that you have not analysed each and every problem.
Why are you so certain that the incoherency solver gives all possible solutions to a given problem? I presume that you have not analysed each and every problem.
- Sat Aug 18, 2018 11:40 am
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
Re: incoherency solver
Owen Carroll:
Do you have any evidence to back your claim?
Do you have any evidence to back your claim?
- Wed Aug 15, 2018 8:26 pm
- Forum: Countdown - General
- Topic: incoherency solver
- Replies: 23
- Views: 12966
incoherency solver
Does the incoherency number solver give all possible solutions?
- Sat Aug 04, 2018 9:27 am
- Forum: Countdown - Spoilers
- Topic: Spoilers for Friday 3rd August 2018 (Series 79, Prelim 28)
- Replies: 14
- Views: 10180
Re: Spoilers for Friday 3rd August 2018 (Series 79, Prelim 28)
What is meant by the "standard method"? Is there a "standard" algorithm to solve the number problem?Tony Atkins wrote: ↑Fri Aug 03, 2018 2:08 pm 2nd numbers - 1 away (933) by the standard method, but out of time (100-6)x(8+50/25)-8=932.
- Sun Jul 01, 2018 2:58 pm
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
Elliott: My apologies for missing the last "t".
This number 13,243 is not too large. It may be possible to calculate the target range for each number set.
This number 13,243 is not too large. It may be possible to calculate the target range for each number set.
- Sat Jun 30, 2018 8:45 am
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
As Elliot Mellor has pointed out, my values were gross over estimates. The correct results appear to be for 6 small, 0 large = 2850 for 5 small, 1 large = 1452*4 = 5808 for 4 small, 2 large = 615*6 = 3690 for 3 small, 3 large = 210*4 = 840 for 2 small, 4 large = 55*1 = 55 total = 13243 This number i...
- Sat Jun 30, 2018 1:32 am
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
Sorry for the mistake; as Graeme Cole and Rhys Benjamin have indicated as indicated, there are 899 targets (not 898).
- Sat Jun 30, 2018 12:15 am
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
Some believe that 100 is not a valid target since if the number 100 is in the rack and the target is also 100 then there is no computations to be done. Using this assumption (many believe that this is the case with C4 countdown) there are only 898 targets.
- Fri Jun 29, 2018 11:42 pm
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
I accept that the number of possible problems is large but not too large. for 6 small, 0 large = C(20,6) = 38,760 for 5 small, 1 large = C(20,5)*C(4,1) = 15,504*4 = 62,016 for 4 small, 2 large = C(20,4)*C(4,2) = 4,845*6 = 29,070 for 3 small, 3 large = C(20,3)*C(4,3) = 1,140*4 = 4560 for 2 small, 4 l...
- Fri Jun 29, 2018 5:51 pm
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
Re: impossible number problems
Thanks for links for solvers. I am interested in analysing
(a) impossible problems (b) problems which are solvable but declared as impossible initially (c) problems with unconventional solutions
(a) impossible problems (b) problems which are solvable but declared as impossible initially (c) problems with unconventional solutions
- Fri Jun 29, 2018 2:03 pm
- Forum: Countdown - General
- Topic: impossible number problems
- Replies: 16
- Views: 9230
impossible number problems
Is there a repository (data base) for impossible number problems?