Hi,

You could try this:

=A1*100+COUNTIF(A1:$A$9,A1)

(data e.g. in A1:A9)

If you multiply the original figure by 100 you allow enough duplicates
and you avoid that a modified figure matches another number i.e. if
your duplicate is "5" and you append "3" you might have a number "53"
already in your list.

Regards,

Hans

KK schrieb:

Hello,

I have a list of integer numbers in a single column. They are in no
particular order, and I cannot sort them (it would upset the rest of the
spreadsheet). Some of the integers are repeated more than once, & I want to
increase the repeats by 1, then 2, 3 ... so that I end up with a list of
unique integers. So for example if I have 5,27,21,5,33,5,5 I would end up
with 5,27,21,6,33,7,8.

I've been studying the Match, & other Lookup functions, but am unclear about
the best approach.

Hope this makes sense ?

Thanks

K