#include <fstream>

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