#include <bits/stdc++.h>
using namespace std;
void __print(int x) { cerr << x; }
void __print(long x) { cerr << x; }
void __print(long long x) { cerr << x; }
void __print(unsigned x) { cerr << x; }
void __print(unsigned long x) { cerr << x; }
void __print(unsigned long long x) { cerr << x; }
void __print(float x) { cerr << x; }
void __print(double x) { cerr << x; }
void __print(long double x) { cerr << x; }
void __print(char x) { cerr << '\'' << x << '\''; }
void __print(const char *x) { cerr << '\"' << x << '\"'; }
void __print(const string &x) { cerr << '\"' << x << '\"'; }
void __print(bool x) { cerr << (x ? "true" : "false"); }
template <typename T, typename V>
void __print(const pair<T, V> &x) {
  cerr << '{';
  __print(x.first);
  cerr << ',';
  __print(x.second);
  cerr << "} ";
}
template <typename T>
void __print(const T &x) {
  int f = 0;
  cerr << '{';
  for (auto &i : x) cerr << (f++ ? "," : ""), __print(i);
  cerr << "}";
}
void _print() { cerr << "]\n"; }
template <typename T, typename... V>
void _print(T t, V... v) {
  __print(t);
  if (sizeof...(v)) cerr << ", ";
  _print(v...);
}
long long dx[4] = {-1, 1, 0, 0};
long long dy[4] = {0, 0, -1, 1};
long long XX[] = {-1, -1, -1, 0, 0, 1, 1, 1};
long long YY[] = {-1, 0, 1, -1, 1, -1, 0, 1};
long long N = (long long)(5 * 1e5 + 10);
long long tt, n, query, q, k, value, m, x, val, a, b, c, d, e, sum = 0;
int main() {
  clock_t tStart = clock();
  int test;
  cin >> test;
  while (test--) {
    long long n;
    cin >> n;
    char arr[n][n];
    for (int i = 0; i < n; i++) {
      for (int j = 0; j < n; j++) {
        cin >> arr[i][j];
      }
    }
    bool ans = true;
    for (int i = 0; i < n - 1; i++) {
      for (int j = 0; j < n - 1; j++) {
        if (arr[i][j] == '1' && arr[i][j + 1] == '0' && arr[i + 1][j] == '0') {
          ans = false;
        }
      }
    }
    if (ans) {
      cout << "YES\n";
    } else {
      cout << "NO\n";
    }
  }
  return 0;
}
