#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int main()
{
    int n,a,b,r;
    fin>>n;
    for(int i=1;i<=n;i++)
    {
        fin>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<endl;
    }
}