=randbetween() doesn't have a memory.

If you're populating a range with random numbers, you may want to use J.E.
McGimpsey's RandInt Userdefined function:

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

Rod wrote:

How do I stop getting duplicate numbers when using the formula -
=randbetween(1,24)

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Dave Peterson