To solve the numbers game as seen on the Countdown TV show:

simply type in the six "chosen" numbers and the target number. An example solution appears if there is one, otherwise an example of the closest possible match is displayed.
In searching for a solution, all possible arithmetic combinations of the numbers are tried until an exact match or the closest possible attempt is found.

In "extended mode", you can enter upto twenty arbitrary numbers instead of the six required in Countdown, and see all possible solutions. All results may be saved to file.

Countup - automate the Countdown numbers game
There are a number of excellent computer programs for solving the Countdown numbers game. For links to these, or if you want to know anything about this popular TV game show, see thecountdownpage
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Freeware download:
Countup.zip (398 Kb)
Countup.zip (398 Kb)