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Danube Competition in Mathematics
2015 Danube Mathematical Competition
3
3
Part of
2015 Danube Mathematical Competition
Problems
(2)
Danube Math Competition,juniors problem 3
Source:
10/31/2015
Solve in N
a
2
=
2
b
3
c
+
1
a^2 = 2^b3^c + 1
a
2
=
2
b
3
c
+
1
.
number theory
P48. Romania Danube Mathematical Competition
Source:
5/15/2018
Determine all positive integers
n
n
n
such that all positive integers less than or equal to
n
n
n
and relatively prime to
n
n
n
are pairwise coprime.
Divisibility
RMN