hi community

is there a way to do checking for repeated data entry in a range of cells,

A B C D E F

1 10 5 6 11 3 9

2 5 13 2 11 1 0

as an example above, i want to check for repeated data in the cell range and
have it highlighted if more than 1 cell are detected

any help would be much appreciated

thanks community
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oldLearner57