You could have downloaded Mindgames Numgrid 1.0 from our software library for free. Commonly, this program's installer has the following filename: NUMGRID.EXE. The following version: 1.0 was the most frequently downloaded one by the program users. This free program is an intellectual property of Ihsan Ul Haque. The program lies within Games, more precisely Puzzle.
From the developer:
In this game you are given a set of four numbers located at the corners of a 7 x 7 grid. You are required to fill the grid with numbers 1 to 9 and signs - * to make the given four numbers. The computer can also solve number grids. Under the Puzzle menu click 'Set a Puzzle for computer to solve'.
You may want to check out more software, such as Christmas Quest, Firewoks Extravaganza or Sudoku XL-Solver, which might be similar to Mindgames Numgrid.