Question #ec46a

1 Answer

1350, 2700, 4050, 5400, 6750, 8100, and 9450

Explanation:

#3*5*9*10=1350#
Any multiple of this value also works as long as they are 4 digits.
#1350*2=2700#
#1350*3=4050#
#1350*4=5400#
6750, 8100, and 9450 are the other ones.