Four consecutive whole numbers $$A$$, $$B$$, $$C$$ and $$D$$ are all composite numbers. What is the smallest possible value of $$A+B+C+D$$?  [A Composite Number is a whole number that can be divided exactly by whole numbers other than $$1$$ or itself.] 
Overseas Competition->Knowledge Point->Number Theory Modules->Prime and Composite Numbers->Determining Prime and Composite Numbers