Originally Posted by
Wilmer But that assumes brackets and indirect multiplication by 10
(or division by .1) are allowed.
Other ways are possible if not only +-/* are allowed, like:
FLOOR(2^8 / 7 +1) or CEILING(2^8 / 7 * 1).
Since this is a problem given to an 11 y.o. grand daughter
(I have one of those too, Kenny; turned 11 last month!),
I doubt that anything "complicated" is involved.
I have a feeling that with only +-/* allowed, one of the
4 numbers is a typo; if 1,2,7,9 : 29 + 1 + 7 = 37.
Or if 1,2,7,8 to get 36 (not 37): (8 - 2) * (7 - 1) = 36.
But that assumes brackets allowed.
In other words, I think problem as stated is not possible...