a) [tex] D_{10}= \{1,2,5,10\}[/tex]
[tex] M_{5}= \{0,5,10,15,20......\}[/tex]
D10 ∩ M5={5,10}
b) [tex] D_{12}= \{1,2,3,4,6,12\}[/tex]
[tex] M_{6}= \{0,6,12,18,24......\}[/tex]
D12 ∩ M6={6,12}
c) [tex] D_{20}= \{1,2,4,5,10,20\}[/tex]
[tex] D_{15}= \{1,3,5,15\}[/tex]
D20 U D15={1,2,3,4,5,10,15,20}
d) [tex] D_{40}= \{1,2,4,5,8,10,20,40\}[/tex]
[tex] M_{5}= \{0,5,10,15,20,25,30,35,40......\}[/tex]
D40 ∩ M5={5,10,20,40}
