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

int main()
{
    int n, x, y;
    fin>>n;
    for(int i=1; i<=n; i++) {
        fin>>x>>y;
        while(y!=0) {
            int r=x%y;
                x=y;
                y=r;
            }

        fout<<x<<endl;
    }

    return 0;
}