#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    int a, b, r;
    int t;
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");

    f>>t;
    for(int i=1; i<=t; i++)
    {
        f>>a>>b;
        while(b!=0)
        {
            r = a%b;
            a = b;
            b = r;
        }
        g<<a<<"\n";
    }
    return 0;
}