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Mexico Contests
Mexico National Olympiad
1989 Mexico National Olympiad
2
2
Part of
1989 Mexico National Olympiad
Problems
(1)
a|b^2, b^2|a^3, a^3|b^4, b^4|a^5$, but a^5 does not divide b^6
Source: Mexican Mathematical Olympiad 1989 OMM P2
7/27/2018
Find two positive integers
a
,
b
a,b
a
,
b
such that
a
∣
b
2
,
b
2
∣
a
3
,
a
3
∣
b
4
,
b
4
∣
a
5
a | b^2, b^2 | a^3, a^3 | b^4, b^4 | a^5
a
∣
b
2
,
b
2
∣
a
3
,
a
3
∣
b
4
,
b
4
∣
a
5
, but
a
5
a^5
a
5
does not divide
b
6
b^6
b
6
number theory
Divisors