=and() will return true if all are true,=or() will return true if one is true
--
paul
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"Biff" wrote:

Hi!

One way:

=COUNT(A1:A10)=COUNTA(A1:A10)

Biff

"Tetsuya Oguma" wrote in message
...
Hi all,

A simple function question.

What is a function that returns Truse if all the selected cells are
validated as True by ISNUMBER function and False if any of them is False?
Something like {=ISNUMBER(A1:A10)}???

Thanks in advance.