// Euclid.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <fstream>

using namespace std;

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


int n;

int cmmdc(int x, int y)
{
	while (y != 0)
	{
		int r = x % y;
		x = y;
		y = r;
	}
	return x;
}

void citire()
{
	cin >> n;
	int x, y;
	while (n > 0)
	{
		cin >> x >> y;
		cout << cmmdc(x, y);
		n--;
	}
}



int main()
{
	citire();
}

// Run program: Ctrl + F5 or Debug > Start Without Debugging menu
// Debug program: F5 or Debug > Start Debugging menu

// Tips for Getting Started: 
//   1. Use the Solution Explorer window to add/manage files
//   2. Use the Team Explorer window to connect to source control
//   3. Use the Output window to see build output and other messages
//   4. Use the Error List window to view errors
//   5. Go to Project > Add New Item to create new code files, or Project > Add Existing Item to add existing code files to the project
//   6. In the future, to open this project again, go to File > Open > Project and select the .sln file