Formula to return single unique value from column

[excelji]

I have a list of numbers in cells B3:B10.

There is only one unique value in the list and the rest are duplicates.

I need a formula in cell B1 that would tell me what that one unique value is?

Thanks.

[AlKey]

Maybe this

=INDEX(B3:B10,SMALL(IF(B3:B10<>MODE(B3:B10),ROW(B3:B10)-ROW(B3)+1),1))

or this

=MIN(IF(B3:B10<>MODE(B3:B10),B3:B10))

...confirmed by pressing CTRL+SHIFT+ENTER to activate the array, not just ENTER. You will know the array is active when you see curly braces { } appear around your formula. If you do not CTRL+SHIFT+ENTER you will get an error or a clearly incorrect answer. Press F2 on that cell and try again.

	B	C	D
3	5		3
4	5
5	5
6	5
7	5
8	3
9	5
10	5

[boopathiraja]

iN C3

=INDEX($B$3:$B$10,MATCH(0,COUNTIF($C$2:C2,$B$3:B10),0))

Give ctrl+shift+enter

[martindwilson]

maybe
=INDEX(B3:B10,MATCH(1,FREQUENCY(B3:B10,B3:B10),0))