Surfing the Internet
What are some websites devoted to solving puzzles?
There are literally hundreds, if not thousands, of recreational math websites, especially those devoted to solving easy, medium, and hard puzzles. The following is just a taste of what is out there:
A great site with many listings of puzzles—for younger and older puzzle aficionados.
This site offers what it advertizes, including puzzles that are simple to a definite challenge for some. It also offers other information about solving mathematical calculations, including many calculators (for example, a mortgage calculator) and conversion sites.
Interactive Mathematics Miscellany and Puzzles
A little bit of everything, from games and puzzles, to fallacies and visual illusions.
Another great site for recreational math and puzzles.
Illusions, puzzles, tricks, and toys can be found here. There is also a gift shop, puzzle links, and help.