#include <iostream>
#include <fstream>

using namespace std;

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

int main() { 

	int x;
	int nr1, nr2, rest;
	fin >> x; 
	for (int i = 1; i <= x; i++) {

		fin >> nr1 >> nr2;
		while (nr2 != 0) {
			rest = nr1 % nr2;
			nr1 = nr2;
			nr2 = rest;
		}
		fout << nr1 << "\n";
	}


	return 0;
}