#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");

int main()
{
    int n,a,b,i,r;
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>a>>b;
        while(b!=0)
        {
            r= a % b;
            a = b;
            b=r;
        }
        g<<a<<'\n';
    }
    return 0;
}