The number 9 is the greatest one-digit number.
The digit (not didgit) 1.
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1.
1,000
The greatest 3-digit number is 999. 9+9+9 = 27 The sum of the greatest 3-digit number is 27.
Since the greatest digit is 9 and the greatest 2-digit number is 99, the product of them is 891.
2 digit number
It is 891.
The digit (not didgit) 1.
It is: 8
The digit with the second greatest value in the number is '1'. its value is second to the largest number which is 2.
The greatest six-digit number is 199,999.
0
1
Greatest 2 digit positive number is 99 and adding 1 to it will yield 99 + 1 = 100
1
It is: 9