Răspuns :
Mulţimea 16,24,32,40,48,64,72,80,10,20,30,40,50,60,70,80,90,
a) 16,24,32,40,48,56,64,72,80,88 ,96
b)10,20,30,40,50,60,70,80,90
c)11,22,33,44,55,66,77,88,99
d) 15,30,45,60,75,90
b)10,20,30,40,50,60,70,80,90
c)11,22,33,44,55,66,77,88,99
d) 15,30,45,60,75,90