Problem B. 4751. (December 2015)
B. 4751. Prove that \(\displaystyle 3^{n}+5^{n}\) is not a perfect square for any positive integer \(\displaystyle n\).
Proposed by G. Somlai, Budapest
(4 pont)
Deadline expired on 11 January 2016.
Statistics:
204 students sent a solution.  
4 points:  179 students. 
3 points:  13 students. 
2 points:  6 students. 
1 point:  3 students. 
0 point:  2 students. 
Unfair, not evaluated:  1 solution. 
