This is volume 1 in a series of books of 7 x 7 CrossFigure puzzles. A CrossFigure is like a crossword, but it uses numbers instead of letters. Each digit occupies a square and can be part of a "word" in the across and down directions. Each clue is a mathematical relationship with other clues. For example, a puzzle might have the clue that 1 Across equals 4 Down plus 6 Across. Visit http: //3DMathPuzzles.com to download free CrossFigure, TripleCross, and 3D puzzles
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