#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int main()
{
    int a,b,ct,r;
    fin>>ct;
    while(ct)
    {
        fin>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<"\n";
        ct--;
    }
    fin.close();
    fout.close();
    return 0;
}