Tim said:
....
I was hoping for something a bit more concise, but I will work with
what I must.
You want concise? Then consider
=IF(COUNT($M$33,$M$16,$M$25)=3,<TrueResult>,<FalseResult>)
If all of your cells were in a single area range, then you could use an
array formula involving AND(ISNUMBER(<range>)), but with your nonadjacent
arguments using COUNT and hardcoding the desired result (3) is the best you
could do. Also note that this only works when you're checking that they're
all numbers.