#include <bits/stdc++.h>

using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
int a ,b ,i ,r ;

int main()
{
    int t;
    fin>>t;
    for(i=1;i<=t;i++)
    {
        fin>>a>>b;
        while(b)
        {
            r=a%b;
            a=b;
            b=r;
        }
        fout<<a<<endl;
    }
    return 0;
}