[tex]\it a)\ \ 77=7\cdot11\ \Rightarrow\ 7|77\ \ sau\ \ 11|77\\ \\ b)\ \ 65=5\cdot13\ \Rightarrow\ 5|65\ \ sau\ \ 13|65\\ \\ f)\ \ 60=3\cdot4\cdot5 \Rightarrow3|60,\ \ sau\ \ 4|60,\ \ sau\ \ 5|60\\ \\ g)\ \ 124=4\cdot(27+4)\ \Rightarrow 124=4\cdot31 \Rightarrow 4|124,\ \ sau\ \ 31|124\\ \\ \\ h)\ \ 1450=2\cdot5^2\cdot29 \Rightarrow 1450=2\cdot25\cdot29 \Rightarrow \begin{cases}\it 2|1450\\ \\ \it 25|1450\\ \\ \it 29|1450\end{cases}\\ \\ \\ i)\ \ 232=8\cdot(32-3) \Rightarrow 232=8\cdot29 \Rightarrow 8|232,\ sau[/tex]
