keep duplicated numbers, eliminate single occurances

[J.W. Aldridge]

String of numbers....

First, i would need to conver data to numbers as some of them are
formatted as =("#### "). And I assume that some may have leading/
trailing spaces since the data is uploaded.

Second, i need to keep any numbers that have been duplicated anywhere
in the string and DELETE the ones that appear only once.

String of data starts with C4 and the end of the list/string varies.

 

[Don Guillett Excel MVP]

String of numbers....

First, i would need to conver data to numbers as some of them are
formatted as =("#### "). And I assume that some may have leading/
trailing spaces since the data is uploaded.

Second, i need to keep any numbers that have been duplicated anywhere
in the string and DELETE the ones that appear only once.

String of data starts with C4 and the end of the list/string varies.

"If desired, send your file to dguillett @gmail.com I will only look
if:
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2. You give me the newsgroup and the subject line
3. You send a clear explanation of what you want
4. You send before/after examples and expected results."