Example: First you start by using (in this case) the four. You multiply it first by the two, then by the one. (I apologize for the asterisks, they were necessary to keep the spacing.)
12 *12...
Put a decimal point after the two digit number and add zeros after the decimal point. Then you can divide just as you always would, with the answer being less than one. For example, to divide 40 by...
The 2-digit number must be 20, because it is the only 2-digit number whose sum of its two even digits, 2 + 0 = 2, is greater than the product of its two even digits, 2 x 0 = 0. Moreover, 20 is a...