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

    f>>t;
    for(i=1; i<=t; i++)
    {

        f>>a>>b;

        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }

        g<<a<<"\n";
    }


    return 0;

}