MathDB
a/b = a.b

Source: Iran second round- 2013- P1

May 4, 2013
number theory proposednumber theory

Problem Statement

Find all pairs (a,b)(a,b) of positive integers for which gcd(a,b)=1\gcd(a,b)=1, and ab=b.a\frac{a}{b}=\overline{b.a}. (For example, if a=92a=92 and b=13b=13, then b/a=13.92b/a=13.92 )