How to find multiple repeated cell value.

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Also show expected results, and why

crossposted: https://www.mrexcel.com/board/thread...value.1172440/

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G2:

=IF(SUM(N(MMULT(N(ISNUMBER(MATCH($B$2:$F$9,B2:F2,0))),TRANSPOSE(COLUMN(B2:F2)^0))>=3))>=2,"X","")

**Array formulas are not entered in the same way as 'standard' formulas. Instead of pressing just ENTER, you first hold down CTRL and SHIFT, and only then press ENTER. If you've done it correctly, you'll notice Excel puts curly brackets {} around the formula (though do not attempt to manually insert these yourself).

(Special credit to my friend, Wa Godeg from my Excel group, for his solution)