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