#include <bits/stdc++.h>
using namespace std;

void mainSolve()
{
  int n = 0, ans = 0;
  cin >> n;
  vector<int>v(n);
  for (int i = 0; i < n; i++) {
    cin >> v[i];
  }
  for (int i = 0; i < n; i++) {
    int temp;
    cin >> temp;
    if (v[i] == temp) {
      ans++;
    }
  }
  cout << ans << endl;
}

int main()
{
  int t;
  cin >> t;
  while (t--)
  {
    mainSolve();
  }
  return 0;
}