#include <iostream>
#include <fstream>
using namespace std;
int n,i,a,b,r;
int main()
{ifstream f("euclid2.in");
ofstream g("euclid2.out");
f>>n;
for(i=1;i<=n;i++){
f>>a>>b;
while(b!=0){
r=a%b;
a=b;
b=r;
}g<<a<<"\n";

}

}