#include <iostream>
#include <fstream>

using namespace std;
ifstream fin ("euclid2.in");
ofstream fout ("euclid2.out");
int a,b,r,n;
int main()
{
    fin>>n;
    while (n--)
    {
        fin>>a>>b;
        while (b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<"\n";
    }
    return 0;
}