#include <fstream>

using namespace std;

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

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