With no digit rejected, 999999999
With no digit repeated, 987654321
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Since the greatest digit is 9 and the greatest 2-digit number is 99, the product of them is 891.
Since the greatest 1-digit number is 9, the answer is 9 x 9 = 81.
It is 999999998.
999,999,998 is.
The greatest two-digit odd number is 99. In a two-digit number, the first digit can range from 1 to 9, and the second digit can range from 0 to 9. Since we are looking for an odd number, the second digit must be odd, limiting our options to 1, 3, 5, 7, or 9. Among these, 99 is the greatest possible two-digit odd number.