#include <bits/stdc++.h>

using namespace std;

ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

int cmmdc(int a,int b)
{
    int r;
    while(b!=0)
    {
        r=a%b;
        a=b;
        b=r;
    }
    return a;
}
int main()
{
    int n,a,b,x;
    fin>>n;
    for(int i=1; i<=n; i++)
    {
        fin>>a>>b;
        x=cmmdc(max(a,b),min(a,b));
        fout<<x<<'\n';
    }
    return 0;
}