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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("euclid2.in");
ofstream fout("euclid2.out");
long long a,b,r,t,i,c[100002];
int main()
{
    fin>>t;
    for(i=1;i<=t;i++)
    {
        fin>>a>>b;
        while(a)
        {
            r=b%a;
            b=a;
            a=r;
        }
        c[i]=b;
    }
    for(i=1;i<=t;i++)
    {
        fout<<c[i]<<'\n';
    }
    return 0;
}