#include <fstream>

using namespace std;

ifstream cin ("euclid2.in");
ofstream cout ("euclid2.out");

long n,i,a,b,r;

int main()
{
    cin>>n;
    for(i=1 ; i<=n ; i++)
    {
        cin>>a>>b;
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        cout<<a<<endl;
    }
    return 0;
}