Data Validation to allow choice of two numbers only (without using a List)

[Jim885]

Its been a while since I needed this, so I forgot how to do it.

I need a way for a user to type into a cell only one of two choices of numbers. Either 50 or 100. I can do this with Data Validation on a list box, but I need the cell to only allow the entry of 50 or 100 by the user typing the value in the cell. Any other number entered in the cell should result in a message box alert telling the user that only 50 or 100 are allowed to be entered in the cell. A macro might suffice, but the primary goal is for a way to do this with data validation.

Thanks for any help.

 

[Weazel]

maybe...

data validation...custom...=OR(A1=50,A1=100)

 

[Jim885]

That's it.

I was close, my best guess was trying =OR(50,100) ... which didn't work.

Thanks!!!