#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int n,i,x,y,r;
int main()
{
    f >> n;
    for(i = 1;i <= n; i++)
    {
        f >> x >> y;
        while(y != 0)
        {
            r = x % y;
            x = y;
            y = r;
        }
        g << x <<"\n";
    }
    return 0;
}