Try this:

=IF(B13=30,"Keep it up","You need to do "&(30-B13))

Hope this helps.

Pete


On Jan 24, 12:38 pm, "
wrote:
i'm trying to make a question in an excel quiz so that it calculates
the answer within a formula

here is an example

http://i86.photobucket.com/albums/k9...remans/img.jpg

where the ****'s are, i want it to calculate 30-B13 (the destination
cell) inside the same formula, as the value_if_false.

how would i go about doing this?