Use

=SUM(N(INDIRECT(CHAR({7,10,13,16} + 64) & "10")))

or if you just want to sum every third cell from G10 to P10

=SUMPRODUCT(--(MOD(COLUMN(G10:P10),3)=1),G10:P10)



--

Regards,

Peo Sjoblom

"Kleev" wrote in message
...
Based on a question in a different forum, I was trying to see if I could
figure out the answer using some of the new techniques I've seen on these
forums. I wrote the following formula, which I can't seem to get to work,
although using F9 to calculate parts of the formula seem to indicate it
should work. Can someone point me in the right direction, assuming what I
am
trying is possible.
My formula is:
=SUM(INDIRECT(CHAR({7,10,13,16} + 64) & "10"))

In cells G10, J10, M10, and P10 I have valuse of 100, 200, 300, and 400
respectively.

CHAR({7, 10, 13, 16} + 64) & "10" processed with F9 gives
{"G10","J10","M10","P10"}.

Then if I press F9 on INDIRECT(CHAR({7,10,13,16} + 64) & "10"), I get
{100,200,300,400}. So now my formula is =SUM({100,200,300,400}). If I
enter
this formula in another cell, I get 1000. However, if I use the original
formula, no matter whether I enter it normally or as an array formula, I
get
100. What's up with that?

This appears to be the step that it is failing on as it returns 100, but I
don't know how to fix it or if it is doable:
=SUM(INDIRECT({"g10","j10","m10","p10"}))

Can anyone shed any light as to if this is doable like this and if so,
what
I need to change in order to make it work? Thanks.