Hi,
In cell A1 type =RAND() and copy that down to A100. In cell B1 type:
=MATCH(LARGE($A$1:$A$100,ROW()),$A$1:$A$100,0)
and copy that down to B100.
Now in column B you should have numbers 1-100 that are unique and in
random order.
Of course there is a slight change that Excels RAND function returns
same number twice or more in a group of hundred, but that change is
something like 1:1E13.
- Asser