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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 points)

This problem is for grade 9 students only.

Deadline expired on 12 January 2015.

Statistics on problem K. 441.
 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.

• Problems in Mathematics of KöMaL, December 2014

•  Támogatóink: Morgan Stanley