#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    ifstream in("euclid2.in");
    ofstream out("euclid2.out");
    int n, a, b, i;
    in>>n;
    for(i=1; i<=n; ++i)
    {
        in>>a>>b;
        while(a!=b)
        {
            if(a>b)
            {
                a=a-b;
            }
            else
            {
                b=b-a;
            }
        }
        out<<b<<"\n";
    }
     return 0;
}