#include <iostream>
#include<fstream>
using namespace std;
int T,i,a,b,r;
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<<endl;
        }
    return 0;
}