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

int main()
{
    int T,a,b,r,i;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    f>>T;
    for (i=1;i<=T;i++)
    {
        f >> a >> b;
        r=0;
        while (b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        g<<a<<endl;
    }
    return 0;
}