#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int a,b,n,i,r;
int main()
{

    f>>n;
    for(i=0;i<n;i++)
        {
            f>>a>>b;
            while(b>0)
                {
                r=a%b;
                a=b;
                b=r;
                }
            g<<a<<"\n";
        }


 f.close();
 g.close();
    return 0;
}