#include<fstream>
#include<iostream>
#include<string>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int a,b,n,r,i;
int main()
{
    f>>n;
    for(i=1;i<=n;i++)
    {
        f>>a>>b;
        do{
            r=a%b;
            a=b;
            b=r;
        }while(r!=0);
        g<<a<<'\n';
    }
    return 0;
}