#include<iostream>
#include<fstream>


using namespace std;


ifstream fin("euclid2.in");
ofstream fout("euclid2.out");

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

	return a;
}

int main()
{
	int T, a, b;
	fin >> T;
	for (int i = 1; i <= T; i++) 
	{
		fin >> a >> b;

		fout << cmmdc(a, b) << "\n";
	}

	return 0;
}