Hello Miles.
10 Sep 04 05:14, you wrote to me:
MM> G'morning Jason,
MM> I got an opportunity to read through your steps there, and to
MM> meditate on differences of approach.
MM> Did you scratch-pad your run in the message itself, or use a
MM> spreadsheet on the side ?
no spreadsheet, most of the arithmetic was done in bash (the linux command-line)
eg: the the list of squares divisible by nine was done like this
done > somefile
MM> My run at it, having checked out the arithmetic, lay in using qb
MM> to check out, what values of TEN would produce a one-less square
MM> divisible by 9 ... 145, 325, 730 and 901.
I started with squares divisible by 9 as they were easy to predict.
initially I calculated them by hand, but then gave up and used the computer
(as it was before breakfast and my brain was underperfrming.
n=12: while [ x lt 32 ] do echo $x $((x*x)) $((x*x+1)) ; x=$((x+3));
which after berakfast it shouldn't have been difficult to do on paper.
MM> I used these values in another qb scratcher to test for values of
MM> I and Y that would see SIX squares between TEN and NINETY for each
MM> of the possible TENs, and bingo-ed into the solution.
I didn't, first I rejected 730 (because N=0) and that's no good for NINETY
MM> Using qb this way is a far cry from the mind-stretching logic that
MM> a 1960's Scientific American puzzle from Martin Gardner demanded
MM> to solve...
yeah, I think my approach of determineing possible NINETYs (given
divisibility by 9. there were about 20 I think) and then doing some suqare
roots to kick out value s of SIX i probably closer to the preferred method.
MM> EVE/DID = .TALKTALKTALK....
in other words
EVE/DID = TALK/9999
on my handy command line the using the tool "factor" on 9999
gives me 3 3 11 101
so I= 0
D is 1,3,or 9
D cant be 1 as EVE < DID
hmm, what should I do next, there's still over 180 possible combinations
for E,V and D
depending on the value for DID
EVE*11 = TALK or EVE*33 =TALK
DID*11 = 9999 DID*33 =9999
clearly EVE*11 results in E=K which is not allowed so it must be EVE*33
which means DID=9999/33=303
so given EVE * Origin: (3:640/1042)
SEEN-BY: 633/267 270
@PATH: 640/1042 531 954 774/605 123/500 106/2000 633/267
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