#include <iostream>
#include <fstream>
using namespace std;
unsigned div(unsigned a,unsigned b)
{
    unsigned r=a%b;
    while(r)
    {
        a=b;
        b=r;
        r=a%b;
    }
    return b;
}
int main()
{
    ifstream f("euclid2.in");
    ofstream g("euclid2.out");
    unsigned T,i,a,b;
    f>>T;
    for(i=1;i<=T;i++)
        {
        f>>a>>b;
        g<<div(a,b)<<'\n';
        }
    return 0;
}