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