#include <iostream>
#include <fstream>
using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int cmmdc(int a, int b)
{
    while(a!=b)
    {
        if(a>b) a-=b;
        else b-=a;
    }
return a;
}

int main()
{
   int T, i, a, b;

   f>>T;
for(i=1;i<=T;i++)
{
    f>>a>>b;

    g<<cmmdc(a, b)<<"\n";
}

   f.close();
   g.close();
    return 0;
}