[tex]\bf4.\\ \\ \it 24=2^3\cdot3\\ \\ 30=2\cdot3\cdot5\\\rule{120}{0.8}\\\[[24,\ \ 30]=2^3\cdot3\cdot5=8\cdot15=120[/tex]
[tex]\bf5. \\ \\ \it \overline{32x}\ \vdots\ 9 \Rightarrow\ (3+2+x)\ \vdots\ 9 \Rightarrow\ (5+x)\ \vdots\ 9 \Rightarrow\ x=4[/tex]
[tex]\bf6.\\ \\ \it n=a^1\cdot b^2 \Rightarrow\ N_{div}=(1+1)\cdot(2+1)=2\cdot3=6[/tex]
