If you mean only using nines then 99.
9 and 99
99 + 9 = 108
99. 9 divided by 9=1
90
The largest two-digit even number is 98. In the decimal system, each digit can range from 0 to 9, but for a two-digit number, the first digit cannot be zero. Since we are looking for an even number, the last digit must be an even number, which leaves us with 0, 2, 4, 6, or 8. Among these options, 8 is the largest even digit, resulting in 98 as the largest two-digit even number.
The largest single digit in our numerical system is 9. Once you write 10, you have two digits.
The largest digit is 9.
9
It is 9.
For this type of "the largest number which..." questions, you need to advance from left to right, using the largest possible digit in each case. For the first two digits, that would be 9, for the third digit (the right-most digit), the largest digit which will make this possible is an 8.
300
The largest one digit number that has three factors is 9. Its factors are 1, 3, and 9.