#include<bits/stdc++.h>
#define ll long long

using namespace std;

ifstream f("euclid2.in");
ofstream g("euclid2.out");


int euclid(int a,int b)
{
    if(!b)
        return a;
    else
        return euclid(b,a%b);
}
void readsolve()
{
    int t;
   f>>t;
  cin>>t;
    while(t)
    {
        int a,b;
       f>>a>>b;
       g<<euclid(a,b)<<'\n';

        t--;
    }
}

int main()
{
    readsolve();
}