Nonary numbers are made up only of the digits \(\{0,1,2,3,4,5,6,7,8\}\). Each place in a nonary number corresponds to a power of \(9\).

Because there are only \(9\) different possible digits in a nonary number, we also call them Base \(9\) numbers.

For example, the nonary number \(827\) is equal to the decimal number \(8 \times 9^2 + 2 \times 9^1 + 7 \times 9^0 = 8 \times 81 + 2 \times 9 + 7= 673\).

Some other examples of nonary numbers are:

• \(88\), which corresponds to the decimal number \(80\).
• \(100\), which corresponds to the decimal number \(81\).
• \(105\), which corresponds to the decimal number \(86\).