Pluto Puzzles has a nice collection of word and number puzzles of varying kinds. Some of the more interesting puzzles include:
- Triple Trouble – Take a group of letters add three of another single letter and rearrange the letters to form a word.
- Fifteen – Divide a grid of numbers into fifteen sections each summing to fifteen.
- Addagrams – Add a single letter to a group of words to create new words.
- Mathematical Maelstrom – A set of algebra equations arranged like a crossword.
Enjoy!

