Answer:
90
Step-by-step explanation:
So first you got to see what matches with 10 because it is the biggest number
So if you multiply 10x9 you get 90 then you see if you can make a lower
number fit with 6 like halving it. But 10 does not fit with 45 and so doesn't 6 so
if you also multiply 10x6 you get 60 but 9 doesn't get in so the only lowest
number is 90