#include <iostream>
#include <fstream>
using namespace std;
long t,i,x,y,rez;

int cmmdc(int a,int b)
{
	int r;
	while (b!=0)
	{
		r=a%b;
		a=b;
		b=r;
	}
	return a;
}

int main()
{
	ifstream f("euclid2.in");
	ofstream g("euclid2.out");
	f>>t;
	for (i=1;i<=t;i++)
	{
		f>>x>>y;
		rez=cmmdc(x,y);
		g<<rez<<"\n";
	}
	f.close();
	g.close();
}