#include<fstream>
using namespace std;
long a,b,r,n,i;
int main()
{
    ifstream f("euclin2.in");
    ofstream g("euclid2.out");
    f>>n;
    for(i=1;i<=n;i++)
    {f>>a>>b;
    while(a%b!=0)
    {
    r=a%b;
    a=b;
    b=r;
                 
    }
    g<<b<<endl;}
    f.close();
    g.close();
    return 0;
        
}