#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int t,i,j,r=1,aux,a,b;
int main()
{f>>t;
for(i=1;i<=t;i++)
{
    f>>a>>b;
    if(a>b)
    {
        aux=a;
        a=b;
        b=aux;
    }
  while(b!=0)
  {
      r=a%b;
      a=b;
      b=r;
  }
    g<<a<<"\n";
}


    return 0;
}