The Commodore Puzzle Book: BASIC Brainteasers

The majority of computer books currently available fall into two main categories - either programming manuals or, alternatively, games hand- books with pre-worked listings.
This book is designed to bridge the gap by presenting a variety of brainteasers to stimulate the imagination and give an opportunity to devise original programs which put the computer through its paces. The book is in three main sections.
PUZZLES
No attempt has been made to place the puzzles in any order of difficulty - either mathematically or programwise. None of the problems require any advanced knowledge of mathematics, and they are all well within the power of your Commodore.
PROGRAMS
This section contains an explanation of the puzzles, together with sug- gested program listings. No answers are given here, as this section is mainly intended to steer you in the right direction should you get stuck. Provided that you have adopted the right method, many of the prob- lems take a short time for the computer to solve, or at least produce some indication that things are proceeding along the right track. So if something positive hasn't happened in the time that it takes to make a pot of tea, it might well be that you have a bug in your program, or have chosen the wrong approach.
All the programs listed are in BASIC, with no machine code, so the programs will be easy to understand and run on your Commodore. It should be stated at the outset that the programs listed are only sug- gestions. There may well be other means of approach and you should feel free to experiment, especially in the use of color, sound, and high- resolution graphics.
SOLUTIONS
We hope you will need to refer to this section only to confirm that you have arrived at the correct solution!