They may be one and the same. In those like the Octahedral Cluster Puzzle , as presented, the design becomes the solution. In the Jupiter Puzzle , the intriguing design overshadows the straightforward solution because it is much the more interesting of the two. It is common practice in most puzzle books to include the solutions somewhere. Perhaps some readers will be annoyed not to find them in this book.
Solutions are fine when they serve some purpose.
Certainly a book of riddles would be dull reading without the clever answers included, while answers to crossword puzzles may be educational. In the case of most combinatorial puzzles, including the solutions would add nothing new or interesting. There are exceptions, and note that some solutions have been included in the text. In the puzzling pairs of Tangram figures in which one appears to have a piece missing, the pieces are always rotated 45 degrees from one to the other. The mini-Tangram set of five pieces forms seven convex figures, five of which have multiple solutions.