It would help if the question were more comprehensible!
No, neither of them are.
composite
Neither.
Neither. 8 and 5 is 13.
It is neither.
Neither, a bathtub weighs much more.
Neither.
15 squared is either a two dimensional area or simply a number. Neither of these can have a volume.
15 kilometres is a distance, not a speed. Therefore, it is neither fast nor slow.
No. Only 3 and 5 go into 15, but neither of those go into 28.
Selena Gomez is not neither 15 or 16 Selena Gomez is 17 years old
neither both the same 15 cm = 150 mm = 0.15 metre