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