I had the opportunity to take a fews days off from the
University, where I am a professor of mathematics, and since it was
a long time since I last met with my old friend, George Cash, I
took the plane to Copenhagen. I was suprised to find that winter in
Denmark is almost like winter in St. Petersburg, where I live. Lots
of snow, and bitterly cold. Here's a picture from the
University:
During the stay George told me about geocaching and the danish
geocachers. Especially the "mystery caches" caught my attention,
since I'm rather fond of mathematical puzzles myself. George told
me that some of the danish cachers were pretty sharp at solving
even very difficult puzzles, so I got this idea about making a
puzzle of my own just to test the danish geocachers. George helped
me to sign up as a member and also to fill in the forms for a
new cache, and here it is!
The puzzzle goes like this:
| 28 |
4 |
5 |
390 |
3298 |
| 5 |
798 |
4805 |
398 |
9 |
| 10 |
123 |
6 |
48 |
3 |
| 16 |
1202 |
5 |
18 |
61 |
Happy hunting!
George also helped me getting a translation into danish.
Dansk:
"Bugs" Travalski, der er professor i matematik ved universitetet
i St. Petersborg fortæller:
"Jeg havde pludselig mulighed for et par fridage, og da jeg ikke
havde set min gode ven, George Cash i nogen tid, tog jeg flyveren
til København (oversætterens note: hvor G. Cash opholdt sig efter
at have hjulpet Bugs med en opgave vedr. en kinesisk skat). Jeg var
overrasket over at se at vinteren i Danmark meget lignede den jeg
kender fra St. Petersborg: masser af sne og rigtig koldt.
Billedet foroven er fra universitetet.
Under mit ophold fortalte George mig om geocaching og de danske
geocachere. Specielt de såkaldte "mystery caches" fangede min
opmræksomhed, da jeg selv holder meget af matematiske opgaver.
George fortalte mig at nogle af de danske cachere var meget kvikket
til at løse selv meget svære opgaver. Jeg fik derfor ideen med at
lave min egen opgave, for at se om de nu var så skrappe. George
hjalp mig med at blive medlem på geocaching.com og med at udfylde
en cache formular, så her er opgaven.
God jagt!
You can check your answers for this puzzle on
Geochecker.com.