How many numbers can be expressed as the sum of two or more distinct elements of the set {0,1,2,4,8,16,32,64,128}?
+287 You should think in terms of base-2 representation of nonnegative integers.
+118608 Thanks Bginner, that is a pretty neat way to look at it.
What Bginner means is if you write them all in base2 and then add all of them together in base 2 then you will have the biggest possible number of digit combinations.
I am not explaining it very well and I don't want to give the answer that i got. So think about it.
