#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>
#include <cmath>
#include <ios>
#include <cstdio>
#include <cstdarg>

int euclid(int a,int b)
{
    if(b==0) return a;
    else return euclid(b,a%b);
}

int main()
{
    std::ios::sync_with_stdio(false);
    freopen("euclid2.out","w",stdout);
    freopen("euclid2.in","r",stdin);
    int load;
    int a;
    int b;
    std::cin>>load;
    for(register int i=1;i<=load;i++)
    {
        std::cin>>a;
        std::cin>>b;
        std::cout<<euclid(a,b);
        std::cout<<std::endl;
    }
}