#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{   long long a,b,t,r;
    fin>>t;
    for(int i=1;i<=t;i++)
    {
        fin>>a>>b;
       while(b!=0)
       {
           r=a%b;
           a=b;
           b=r;
       }
        fout<<a<<'\n';
        
    }
    return 0;
}