Problem K. 441. (December 2014)
K. 441. If the sum of the digits of a twodigit number is added to the product of the digits, the result is the number itself. Find all such twodigit numbers.
(6 pont)
Deadline expired on 12 January 2015.
Statistics:
113 students sent a solution.  
6 points:  94 students. 
5 points:  5 students. 
4 points:  3 students. 
3 points:  5 students. 
2 points:  3 students. 
1 point:  1 student. 
Unfair, not evaluated:  2 solutions. 
