FMM5

Multiplication Logic Problem

Problem

In a certain multiplication problem, if one of the digits is replaced by the letter X, and the rest of the digits are left unspecified, it results in the image below. What were the two numbers that were multiplied?

Solution

Via brute force:

      8 6 6 2
        8 3 4
      -------
    3 4 6 4 8
  2 5 9 8 6
6 9 2 9 6
-------------
7 2 2 4 1 0 8