#include<fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int q, a, b;
int cmmdc(int a, int b)
{
    int r;
    while(b != 0)
    {
        r = a%b;
        a = b;
        b = r;
    }
    return a;
}
int main()
{
    f>>q;
    while(q--)
    {
        f>>a>>b;
        g<<cmmdc(a, b)<<"\n";
    }
    return 0;
}