#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int a,b,r,n;
    fin>>n;
    for (int i=1;i<=n;i++)
    {
        fin>>a>>b;
        while (b!=0)
            {
                r=a%b;
                a=b;
                b=r;
            }
        fout<<a<<"\n";
    }

    return 0;
}