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