//#include <iostream>
#include <fstream>
using namespace std;
ifstream cin("euclid2.in");
ofstream cout("euclid2.out");
int main()
{
    int T;
    cin>>T;
    while(T--)
    {
        int a,b;
        cin>>a>>b;
        while(b)
        {
            int r=a%b;
            a=b;
            b=r;
        }
        cout<<a<<'\n';
    }
    return 0;
}