#include <fstream>

using namespace std;
ifstream cin("euclid2.in");
ofstream cout("euclid2.out");
int main()
{
    int n,a,b;
    cin>>n;
    for(int i=1; i<=n; ++i)
    {
        cin>>a>>b;
        int r=1;
        if(a<b) swap(a,b);
        while(r)
        {
            r=a%b;
            a=b;
            b=r;
        }
        cout<<a<<"\n";
    }
    return 0;
}