#include <iostream>
#include <cstdio>
using namespace std;

int main()
{
    freopen("euclid2.in","r",stdin);
    freopen("euclid2.out","w",stdout);
    int a,b,r,n,i;
    cin>>n;
    for(i=1;i<=n;i++)
    {
        cin>>a>>b;
        while(b!=0)
        {
            r=a%b;
            a=b;
            b=r;
        }
        cout<<a<<endl;
    }

    return 0;
}