A small archive of Ask Marilyn Numbrix puzzles is on Parade magazine's web page for the daily Numbrix puzzle, as of July 2015. The page has links to several previous puzzles. Flavor names, such as blueberry or caramel, contain links to more puzzles.
Flavor words categorize puzzles by the specific thinking skills needed for Numbrix solutions. A vanilla puzzle begins with 32 filled-in numbers. Strawberry has 28, while caramel has 24. Pistachio and blueberry puzzles both start with 20 numbers identified.
In general, the more numbers there are, the easier the Numbrix is. However, each flavor offers puzzles with varying levels of difficulty.