#include <iostream>
#include <fstream>

using namespace std;

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

int euclid(int a, int b) {
	while (a != b) {
		if (a > b)
			a = a - b;
		else
			b = b - a;
	}
	return a;
}

int main() {
	int T, a, b;
	fin >> T;
	for (int i = 1; i <= T; ++i) {
		fin >> a >> b;
		fout << euclid(a, b) << endl;
	}
	return 0;
}