#include <iostream>
#include <fstream>

using namespace std;

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

int main()
{
    int a, b, i, n, r;
    f>>n;
    for(i=1; i<=n; i++)
    {
        f>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        g<<a<<"\n";
    }
    f.close();
    g.close();
    return 0;
}