#include <bits/stdc++.h>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int t;

void Euclid(int a, int b)
{
    int r;
    while (b > 0)
    {
        r = a % b;
        a = b;
        b = r;
    }
    fout << a << "\n";
}

int main()
{
    int x, y, i;
    fin >> t;
    for (i = 1 ; i <= t ; i++)
    {
        fin >> x >> y;
        Euclid(x, y);
    }
    return 0;
}