Mathematical and Physical Journal
for High Schools
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Problem A. 376. (May 2005)

A. 376. Is it possible to obtain the array (5,13,42) starting from (1,21,42) by repeating the following steps: It is allowed to swap any two numbers in an array of three numbers (a,b,c), or replace the array by (a,b,2a+2b-c).

(5 pont)

Deadline expired on June 15, 2005.


3 students sent a solution.
5 points:Jankó Zsuzsanna, Paulin Roland, Strenner Balázs.

Problems in Mathematics of KöMaL, May 2005