#include<iostream>
#include<fstream>
using namespace std;
ifstream f("euclid2.in");
ofstream g("euclid2.out");
int main(){
int T,i,a,b,r;
f>>T;
for(i=1;i<=T;i++){
	f>>a>>b;
while(b!=0){
	r=a%b;
	a=b;
	b=r;}
g<<a<<'\n';
}
f.close();
g.close();
return 0;
}