#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int a,b,n,r,i;
int main()
{
    fin>>n;
    for(i=1;i<=n;++i)
    {
       fin>>a>>b;
    while(b!=0)
    {
        r=a%b;
        a=b;
        b=r;
    }

    fout<<a<<'\n';
    }

    return 0;
}