#include <stdio.h>
#define LIM 100011
 
int v[LIM];
int main() {
    int z;
    scanf("%d", &z);
    while (z--) {
        int n;
        scanf("%d", &n);
        // compute xor of all numbers
        int x = 0;
        for (int i = 0; i < n; i++) {
            scanf("%d", v + i);
            x ^= v[i];
        }
        // how many are equal to this xor?
        int a = 0;
        for (int i = 0; i < n; i++) {
            a += x == v[i];
        }
        printf("%d\n", a);
    }
}