#include<fstream>
using namespace std;
ifstream in("euclid2.in");
ofstream out("euclid2.out");
int main () {
	int t,a,b,r,cmmdc;
	in>>t;
	while(t--){
		in>>a>>b;
		while(b){
		r=a%b;
		a=b;
		b=r;
	}
	cmmdc=a;
	out<<cmmdc<<"\n";
   }
   return 0;
}