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

typedef long long ll;
int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    ll t,n;
    string p;
    cin >> t;
    ll a=0;
    while(t--)
    {
        a=0;
        cin >> n;
        while(n--)
        {
            cin >> p;
            for(ll i=0;i<p.length();i++)
                a+=(p[i]-48);
        }
        if(a%3==0)
            cout << "Yes" << endl;
        else 
            cout << "No" << endl;
    }
    return 0;
}