#include <iostream>
#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

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

    return 0;
}