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

int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    int T, a, b, r, i;
    f>>T;
    for(i=1; i<=T; i++)
    {f>>a;
     f>>b;
        while(b>0)
        {r=a%b;
         a=b;
         b=r;}
         g<<a<<endl;
    }
    f.close();
    g.close();
    return 0;
}