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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int T;
    cin >> T;
    
    while (T--)
    {
        int N;
        cin >> N;
        
        unsigned long int digits_sum = 0;
        for (int N_i=0; N_i<N; ++N_i)
        {
            string a;
            cin >> a;
            
            for (int a_i=0; a_i<a.length(); ++a_i)
            {
                digits_sum += a.c_str()[a_i] - '0';
            }
        }
        
        if (digits_sum % 3 == 0)
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
    }
    
    return 0;
}