#include <iostream>
#include <fstream>

using namespace std;

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

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

    f>>T;
    for(int i=1; i<=T; i++)
    {
        f>>a>>b;
        int r=a%b;
        while(r!=0)
        {
            a=b;
            b=r;
            r=a%b;
        }
        g<<b<<endl;
    }

    return 0;
}