Hi.

I need to do some data validation in a range of cells ( ex:A1;B1 and
C1)

1 - Only numbers are allowed
2 - Prevent duplicate numbers

Best regards,
Elio


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efernandes67
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Try this

Select A1:C1 with A1 active cell

Data Validation Allow Custom

and apply this formula

=ISNUMBER(A1)*COUNTIF($A1:$C1,A1)=1


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daddylonglegs
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