#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    int n,a,b,r;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>n;
    for(int i=0; i<n; i++)
    {

        f>>a>>b;
        while (b != 0)
        {
            r = a % b;
                a = b;
                    b = r;
        }
        g<<a<<endl;
    }

    return 0;
}