#include <bits/stdc++.h>

using namespace std;

int n;
int l[110], r[110];

void solve() {
    cin >> n;
    assert(1 <= n && n <= 100);
    for (int i = 1; i <= n; i++) {
        cin >> l[i];
        assert(1 <= l[i] && l[i] <= 100);
    }
    for (int i = 1; i <= n; i++) {
        cin >> r[i];
        assert(1 <= r[i] && r[i] <= 100);
    }
    int best = -1, bestr = -1, who = -1;
    for (int i = 1; i <= n; i++) {
        if ( l[i]*r[i] > best || (l[i]*r[i] == best && r[i] > bestr) ) {
            who = i;
            best = l[i]*r[i];
            bestr = r[i];
        }
    }
    cout << who << "\n";
}

int main() {
    int test;
    cin >> test;
    for (int i = 0; i < test; i++) {
        solve();
    }
    return 0;
}