Update (2005-12-09): I recently learned that Mark Owen (aka Quinapalus) has a website where this puzzle, Interstice, can be found, along with many other novel creations. Highly recommended.
It is better to view his original version as I changed minor presentation details when I recorded it in my notes long ago. I'll keep this page around as a souvenir of one of the few times I've written nontrivial JavaScript code.
p<q<r are three-digit primes, fixed throughout. All answer are to be written in base 10, unless otherwise stated.
| Across | |
|---|---|
| 0 | pqr |
| 8 | Sum of two squares, in base 8 |
| 9 | |
| 11 | 2 x 13A |
| 12 | Multiple of p |
| 13 | |
| 14 | Multiple of r |
| 15 | Prime, written in base 8 |
| 16 | p + q + r |
| 20 | |
| 22 | |
| 23 | 3D / 8 |
| 24 | |
| 25 | 24A2 + 2 |
| 26 | Square |
| 28 | Multiple of 81 |
| 29 | 3 x 0D - 2 |
| Down | |
|---|---|
| 0 | |
| 1 | 2 x 19D |
| 2 | 19D / 2 |
| 3 | |
| 4 | 3√20A + √9A |
| 5 | |
| 6 | 2 x 17D |
| 7 | 2pqr |
| 10 | (Power of 2) + p |
| 12 | |
| 17 | Square |
| 18 | 1D + 2D |
| 19 | |
| 21 | |
| 27 | Composite |
From "Eureka", the journal of the Cambridge University Mathematical Society.
Long ago, Dr. David Paget sent me this puzzle. I have yet to encounter a number puzzle that is as satisfying to solve as this one.
Click here to check your solution