#include <iostream>
#include <cstdio>
#include <stdio.h>
#include <fstream>
#include <set>
#include <vector>
#include <list>
#include <queue>
#include <algorithm>
#include <stack>
#include <string.h>
#include <stdio.h>
#include <limits.h>

using namespace std;ifstream f("euclid2.in");ofstream g("euclid2.out");
int c(int a,int b){int r;while(b){r=a%b;a=b;b=r;;}return a;}
int main()
{int n,a,b,i;f>>n;for(i=1;i<=n;i++){f>>a>>b;g<<c(a,b)<<endl;}return 0;}