#include <iostream>
#include <fstream>
using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int i,n,a,b;

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

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