#include <iostream>
#include <fstream>

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

int t,i;
long long a,b,r;

int main()
{
    fin>>t;
    for(i=1;i<=t;i++)
    {
        fin>>a>>b;
        if(a<b) swap(a,b);
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<"\n";
    }
    return 0;
}