if it is a multuple of 5 and a factor of 6, find their lcm
5 and 6 have no common factors except 1
so the lcm is 30
so any multipule of 30 will be a multipule of 5 and have a factor of 6
30 times 1=30
30 times 2=60
30 times 3=90
30 times 3=120,oops, over 100
so your number could be 30 or 60 or 90
