Problem K. 441. (December 2014)
K. 441. If the sum of the digits of a two-digit number is added to the product of the digits, the result is the number itself. Find all such two-digit numbers.
(6 pont)
Deadline expired on January 12, 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 solutionss.
Problems in Mathematics of KöMaL, December 2014