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


int main() {
    ll T;
    cin >> T;
    for(ll t = 0; t<T; ++t){
        ll n, foo = 0;
        cin >> n;
        string s;
        for(ll i = 0; i<n; ++i){
            cin >> s;
            for(char c:s){
                foo += c-'0';
            }
        }
        if(foo%3 == 0)
            cout << "Yes" << endl;
        else
            cout << "No" << endl;
    }
    return 0;
}