9399
299
99939
The highest such number is 93999.
93,998
The largest six digit number period is 999999. The largest number meeting your criteria is 998949.
900 It is the only three digit number with a nine in the numbers place
9399
The largest single digit in our numerical system is 9. Once you write 10, you have two digits.
999698
2
299
99939
The highest such number is 93999.
2
93,998
999698