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