#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

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