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

}