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