Numbrix (or Numbricks) is a number logic puzzle with simple rules but challenging enough for you to have fun.
It is played on grids with 3x3 to 30x30 cells. The number of cells is equal to the maximum number you can fill in, and some of the cells have numbers in them. The object is to fill in the missing numbers (from 1 to 100 in this book), in sequential order, going horizontally and vertically only.
This 10x10 math puzzle book includes 300 easy puzzles, 300 medium puzzles, and 400 hard puzzles.
These mind games should keep you busy for a while. Grab one now to send it as a gift for your loved ones.