#include <iostream>
#include <fstream>
using namespace std;
int main()
{
    int a, b, r, t, i;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>t;
    for(i=1; i<=t; i++)
    {
        f>>a>>b;
        do
        {
            r=a%b;
            a=b;
            b=r;
        }
        while(r!=0);
        g<<a<<endl;
    }
    f.close();
    g.close();
}