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


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */ 
    int t;
    long a[101];
    cin>>t;
    while(t--){
        int n;
        cin>>n;
        long long sum=0;
        while(n--){
            long temp;cin>>temp;
            while(temp){
                sum+=temp%10;
                temp=temp/10;
            }
        }
        if(sum%3==0){
            cout<<"YES"<<endl;
        }else
            cout<<"NO"<<endl;
    }
    return 0;
}