>>Hi All,
>>
>>I have a need to develop an algorithm that will find the center point of 'N' other points. The total number of other points will be from 2 to 5 typically, though it could go up to around 20.
>>
>
>Simply put, your answer lies in averaging the x's, and averaging the y's, and using those averages as your center.

Depends on what you mean by centre point, it could also be midway between the max & min X & Y

Xmid = Xmin + (Xmax - Xmin) / 2
     = (Xmin + Xmax) / 2

& similarly for Y