13 2dOn putting A=0 and B=13, we can get 13. On putting D=0 and B=13 in eqn (2), we can still get 13. Thus, we can say that the value of D cannot be determed from the given data.Thirteen 2D artwork is belongs to BBC. @ BBC. Numberblocks. Image size 403x710px 120.38 KB © 2019