52 x 431 = 22412 Maximum 245 x 13 = 3185 Minimum.
How many different positive numbers (integers) can you make using each of the digits 1, 2, 3, 4, once only, and a take away sign?
Example 31-24, or 413-2
How many different numbers can be made using only the digits 1, 2, 3, 4 and a + sign? For instance 31+24, or 1+243.