#include <iostream>
#include <fstream>

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");
int cmmdc(int a, int b)
{
    int r;
    while(b!=0)
    {
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}
int main()
{
    int T,a,b;
    f>>T;
    for(int i=1;i<=T;i++)
    {
        f>>a>>b;
        int x=max(a,b);
        int y=min(a,b);
        int k=cmmdc(x,y);
        g<<k<<"\n";
    }
    return 0;
}