#include <iostream>
#include <fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int euclid(int a,int b)
{ int c;
    while(b)
    {
        c=b;
        b=a%b;
        a=c;
    }
    return a;
}
int main()
{
    int t,a,b,n;
    f>>n;
    for(int i=1;i<=n;i++)
    {
        f>>a>>b;g<<euclid(a,b)<<"\n";
    }
    return 0;
}