It is 9.
9999 is the largest 4-digit number.When added with 1 it becomes 10000. 9999 + 1 = 10000.
1
7
The greatest product you can achieve by multiplying a 3-digit number by a 1-digit number is 9720, which comes from multiplying 972 (the largest 3-digit number less than 1000 when divided by 9) by 9 (the largest 1-digit number). Thus, the factors are 972 and 9.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
8
9999 is the largest 4-digit number.When added with 1 it becomes 10000. 9999 + 1 = 10000.
It is 9999 (if a one is added, it becomes a five digit number: 9999 + 1 = 10,000)
1
7
8
The greatest product you can achieve by multiplying a 3-digit number by a 1-digit number is 9720, which comes from multiplying 972 (the largest 3-digit number less than 1000 when divided by 9) by 9 (the largest 1-digit number). Thus, the factors are 972 and 9.
The largest one digit number that has three factors is 9. Its factors are 1, 3, and 9.
999 is the largest 3-digit number.
9797 is the largest two digit prime number.
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
10,000,000 is the smallest 8 digit number 99,999,999 is the largest 8 digit number