\[\boxed{\mathbf{2.}\mathbf{112}}\]
\[80\ на\ 140\ см:\]
\[80\ :15 = 5\ (ост.\ 5)\]
\[140\ :15 = 9\ (ост.\ 5)\]
\[105\ на\ 145:\]
\[105\ :15 = 7\]
\[145\ :15 = 9\ (ост.\ 10)\]
\[120\ на\ 150:\]
\[120\ :15 = 8\]
\[150\ :15 = 10\]
\[Нужно\ взять\ листы\ размером\ \]
\[120\ на\ 150\ см.\]