Depends what you mean.
Greatest number you can make with an expression with just 3's:
3^^^^^^^^^^^^^^^(infinite ^s)^^^^^^^^^^^^3.
A similar number to this would be grahams number. It would take BILLIONS of years just to count how many digits graham's number contains!
973 793
They can be: 830 or 30 to the power of 8
3333
2
999 x 9 = 8991
974
973 793
They can be: 830 or 30 to the power of 8
The greatest 3-digit number is 999. 9+9+9 = 27 The sum of the greatest 3-digit number is 27.
3333
999 x 9 = 8991
2
2
The greatest number would be 871.
999 is greatest.
The greatest 3 digit number is 999, and all three digits are the same.
3. 3 is the greatest number that goes into both 3 and 6.