#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    int t;
    cin>>t;
    while(t--){
        int n;
        cin>>n;
        int ans = 0;
        string str;
        for(int i=0;i<n;i++){
            cin>>str;
            for(int i=0;i<str.length();i++){
                ans +=(str[i]-'0');
            }
        }
        cout << (ans%3==0?"Yes":"No")<<"\n";
        
    }
    return 0;
}