1. First you will asked to choose a number base.  Choose any number base from three to ten.
    You can enter your base as 3 or three, 4 or four, ... , 10 or ten,

  2. Make up a  number of three or more digits in your chosen base.
    Recall in base n the digits are 0, 1, 2, 3, 4, 5, ..., n-1.

  3. Using these same digits, create another number of the same length.
    For example, using base six, if you chose the numer 5413, you would use these same digits to create another four digit number, say 1534.

  4. Subtract the smaller of the two numbers from the larger.
    In the above example, you would calculate 5413 - 1534 to get 3435.

  5. From your answer in Task 4, discard any one of the non-zero digits.
    From 3435 you might remove the 5 to obtain 343.

  6. At a prompt, you will be asked to enter the number that remains after you complete Task 5.
    Here you would enter 343.
As soon as you enter your result (343), I will tell you the digit you discarded.

When you are ready, .

If my answer seems wrong, you had better check your arithmetic and try again.

If you want to leave,