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

int main() {
    int t, n;
    string st, s;
    cin >> t;
    while(t--){
        st.clear();
        cin >> n;
        int tmp = 0;
        for(int i = 1; i <= n; i++) {cin >> s; st += s;}
        for(int i = 0; i < st.length(); i++) tmp += st[i] - 0;
        if(tmp % 3 == 0) cout << "Yes" << endl; else cout << "No" << endl;
    }
    return 0;
}