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

}