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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int maxi(int a,int b)
{
if(a>b)
return a;
return b;
}
int t,i,j,r=1,aux,a,b;
int main()
{f>>t;
for(i=1;i<=t;i++)
{r=1;
f>>a>>b;
if(a>b)
{
aux=a;
a=b;
b=aux;
}
for(j=1;j*j<=a*a;j++)
{
if(a%j==0)
{
if(b%j==0)
r=maxi(r,j);
if(b%(a/j)==0)
r=maxi(r,(a/j));
}
}
g<<r<<"\n";
}
return 0;
}