I want random numbers generated without repeating numbers

[Johncobb]

In my worksheet in column CC in C1:C20 I want Excel to ganerate 20 random
numbers between 1 and 80 without repeating the same numbers.
At present I have the following formula entered and it works, but after I
click F9 some repeated numbers are generated.

=INT(RAND()*(80-1)+1)

How can I change the formula or replace it?
Thank you in advance for your help.
Ragards to all supporters.
John.

 

[Bob Umlas]

put the #s 1-80 in a column (D180) and put =RAND() next to it. Sort D1:E80
by column E. The top 20 values in D (D120) are what you want.

 

[Gord Dibben]

Couple of methods of creating lists of non-repeating random numbers at John
McGimpsey's site.

http://www.mcgimpsey.com/excel/udfs/randint.html


Gord Dibben MS Excel MVP