Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation

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Problem A. 403. (May 2006)

A. 403. Find all positive integers n for which the equation $a + b + c + d = n\sqrt{abcd}$ has a solution in positive integers.

Vietnamise competition problem

(5 pont)

Deadline expired on June 15, 2006.

6 students sent a solution.

5 points: Erdélyi Márton, Estélyi István, Jankó Zsuzsanna, Nagy 224 Csaba, Paulin Roland, Tomon István (6 students).

6 students sent a solution.
5 points:	Erdélyi Márton, Estélyi István, Jankó Zsuzsanna, Nagy 224 Csaba, Paulin Roland, Tomon István	(6 students).