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Old 2016-08-18, 12:03   #1
henryzz
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Default Crossnumber

I am currently solving this crossnumber and finding it very difficult. I also thought that this puzzle would interest many on the forum.

https://issuu.com/chalkdust/docs/chalkdust-issue-03/47
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Old 2016-08-18, 13:03   #2
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Quote:
Originally Posted by henryzz View Post
I am currently solving this crossnumber and finding it very difficult. I also thought that this puzzle would interest many on the forum.

https://issuu.com/chalkdust/docs/chalkdust-issue-03/47
43D is 18
44A gives a hint that 29D ends with an even digit also since 44A and 29D meet at the start of 44A ( the last part of 29D) and 44A is half of 29D we also know that that even digit is half of the start digit of 29D so we are looking for multiples of 7 that are even starting with either 4 or 8 and ending with either 2 or 4 respectively. which makes 44A end with 1 or 2 respectively.
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Old 2016-08-18, 13:35   #3
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The old ones arre the best. Because seven ate nine.
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Old 2016-08-18, 13:40   #4
henryzz
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Have solved 11D, 15A, 23D, 30A, 34D, 39A, 42A, 43D so far,
Down to two possibilities for 31D.
39D is bugging me
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Old 2016-08-18, 14:19   #5
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Quote:
Originally Posted by henryzz View Post
39D is bugging me
okay well it's 2 digits and doesn't have a sum to add to 1

let's see we can eliminate square numbers because they are n*n and n/n = 1 that eliminates 6 numbers out of 90. and 11 is taken out because it's 1 less than double a perfect number ( a number that can be defined as a number for which the sum of the reciprocal of the divisors sums to 2, the reciprocal of 1 is 1) so that also eliminates 55. so we have now taken out 8 numbers out of 90. and since xilman gave you 39 A we can cut to the chase and know that it starts with a 7. secondary edit: and the clue for 24 A shows us the sum of digits will be a two digit number and that doesn't work for secondary digits of 0,1,2, so the second digit must be greater than 2.

Last fiddled with by science_man_88 on 2016-08-18 at 14:47
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Old 2016-08-19, 22:55   #6
petrw1
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Quote:
Originally Posted by henryzz View Post
Have solved 11D, 15A, 23D, 30A, 34D, 39A, 42A, 43D so far,
Down to two possibilities for 31D.
39D is bugging me
Seems the answer is 23. But that doesn't fit with 39A (could be it anything other than 789?)
I can find a solution for every 7x number. Seems 23 is the highest 2 digit number though.
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Old 2016-08-19, 22:58   #7
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Quote:
Originally Posted by petrw1 View Post
Seems the answer is 23. But that doesn't fit with 39A (could be it anything other than 789?)
I can find a solution for every 7x number. Seems 23 is the highest 2 digit number though.
could be 678 in theory I guess or 786 or 78 <digit> or <digit>78 in which case 23 could work I'm trying to figure it out with PARI ( yeah I know I'm cheating).

Last fiddled with by science_man_88 on 2016-08-19 at 23:06
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Old 2016-08-19, 23:07   #8
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Quote:
Originally Posted by petrw1 View Post
Seems the answer is 23. But that doesn't fit with 39A (could be it anything other than 789?)
I can find a solution for every 7x number. Seems 23 is the highest 2 digit number though.
The following link leads to a clarification about 39D: http://chalkdustmagazine.com/categor...s/crossnumber/

By the way, I have attached a pdf-file which should contain the solution of the puzzle.
Attached Files
File Type: pdf solution.pdf (16.0 KB, 51 views)

Last fiddled with by Anonuser on 2016-08-19 at 23:22
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Old 2016-08-19, 23:34   #9
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Quote:
Originally Posted by science_man_88 View Post
could be 678 in theory I guess or 786 or 78 <digit> or <digit>78 in which case 23 could work I'm trying to figure it out with PARI ( yeah I know I'm cheating).
doh I forgot about the sum of digits clue so no 23 would never work.

Quote:
19
28
29
37
38
39
46
47
48
49
55
56
57
58
59
64
65
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67
68
69
73
74
75
76
77
78
79
82
83
84
85
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88
89
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92
93
94
95
96
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98
99
are the only numbers that would work but since the solution has been given the point is nullified.
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Old 2016-08-21, 13:55   #10
henryzz
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Quote:
Originally Posted by science_man_88 View Post
are the only numbers that would work but since the solution has been given the point is nullified.
The solution is useful for checking results but we shouldn't use it to complete the puzzle.
I made a mistake. Once I have fixed that I will post my full progress in solving the puzzle.
There are some interesting programming challenges in this puzzle.
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Old 2016-08-21, 15:13   #11
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Quote:
Originally Posted by henryzz View Post
The solution is useful for checking results but we shouldn't use it to complete the puzzle.
I made a mistake. Once I have fixed that I will post my full progress in solving the puzzle.
There are some interesting programming challenges in this puzzle.
sadly I can't help you much in one sense I made my own test to see what I knew in pari ( by asking yes or no to a question like do you know about or do you know how to use ... though I was wishy-washy on some based my answers I know how to use to some extent 184/832 PARI/gp functions so under 23% is what I know.
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