#include <iostream>
#include <fstream>
using namespace std;
int a,b,n,i;
int main()
{
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
fin>>n;

for(i=1;i<=n;i++)
    {
        fin>>a>>b;
        while(b)
        {
         int r=a%b;
         a=b;
         b=r;
        }
        fout<<a<<"\n";
    }
}