What about 100? I think you have missed many others as well.
if the middle digit is 0 the last digit can be any 10
if the middle digit is 1 the last digit can be 2 or bigger 8
if the middle digit is 2 the last digit can be 4 or bigger 6
if the middle digit is 3 the last digit can be 6 or bigger 4
if the middle digit is 5 the last digit can be 8 or bigger 2
Total so far = 30
the first digit can be 1 to 9
30*9=270