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

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

int cmmdc(int a,int b){
    while(b){
        int r=a%b;
        a=b;
        b=r;
    }

    return a;
}

int main(){

    int n,x,y;
    f>>n;
    for(int i=1;i<=n;++i){
        f>>x>>y;
        g<<cmmdc(x,y);
    }
}