#include <fstream>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");


int main()
{
    int T,a,b,r;
    fin>>T;
    for(int i=1; i<=T; i++)
    {
        fin>>a>>b;
        if(a<b)
            swap(a,b);
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<endl;
    }
    return 0;
}