#include <iostream>
#include <fstream>
using namespace std;

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

int euclid(int a, int b) {

	int r;
	while (b != 0) {
		r = a % b;
		a = b;
		b = r;
	}
	return a;
}

int main() {
	int n, x, y;
	in >> n;
	for (int i = 0; i < n; i++) {
		in >> x >> y;
		out << euclid(x,y) << "\n";
	}
	return 0;
}