#include <iostream>
#include<fstream>
using namespace std;

int main()
{
  ifstream f1("euclid2.in");
    ofstream f2("euclid2.out");
    int t,a,b,r;
    f1>>t;
    for(int i=1;i<=t;i++)
    {
        f1>>a>>b;
        r=a%b;
        while(r!=0)
        {
            a=b;
            b=r;
            r=a%b;
        }
        f2<<b<<endl;
    }
f1.close();
f2.close();
    return 0;
}