#include <iostream>
#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");

int euclid(int a,int b)
{
    while(a!=b)
      if(a>b)
        a=a-b;
      else
        b=b-a;
    return a;
}

int main()
{
    int a,b,n,i;
    f>>n;
    for(i=1;i<=n;i++)
       {
           f>>a>>b;
           g<<euclid(a,b)<<endl;
       }
    return 0;
}