Answer :

vicky189
6. Multiples of 3- 6,9,12,15,18,21,24,27,30
Multiples of 9- 18,27,36,45,54,63,72,81,90
Common Multiples- 9 and 18
7. Multiples of 6- 12,18,24,30,36,42,48,54,60
Multiples of 8- 16,24,32,40,48,56,64,72,80
Common Multiples- 24 and 48

Hope this helps 

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