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