#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    int T=0;
    fstream fin("euclid2.in",ios::in);
    fstream fout("euclid2.out",ios::out);
    fin>>T;
    for(int i=0;i<T;i++)
    {
        int a,b,r;
        fin>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<endl;
    }
    fin.close();
    fout.close();
}