Hi. I'm not much an Excel guy, so I'm hoping someone can help me
fairly quickly. Thanks so much in advance!

I have several columns of numbers, say 10 columns of numbers with the
same number of rows (again, let's keep it simple and say 10 rows -
although I need to run this a few times against different data, so
although it will always be 10 columns, it might be 9 rows in one case,
11 rows in another).

So in my 10x10 grid of numbers, I want to see if A1 has any duplicates
in A2-A10. If it does, I want to either to mark A1 with a "*" or I
could also insert a column between A and B and make B1 = "*". But then
I want to also check A2 for any duplicates in A1 and A3-A10. And do
the same for A3 - checking for any duplicates in A1-A2 or A4-A10. Make
sense? I sure hope so. :)

The problem is, I want to do the same thing for column B, column C,
etc.

So column A could have numbers like:

70 *
73
68 *
70 *
79
68 *
....

Is there any way to do this? I guess I could set up
IF(A1=A2,"*",IF(A1=A3,"*",IF...) but that'd be a nightmare, I think.

Any help would guarantee a Christmas this year! :)

Thanks again so much!
Steve