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