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

int main()
{
    int a,b,t,i,r;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>t;
    for(i=1;i<=t;i++)
       {
              f>>a>>b;
        r=a%b;
        while(r)
        {
            a=b;
            b=r;
            r=a%b;

       }
       g<<b<<"\n";
       }

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