Help me in solving CLB090 problem

My issue

what is this

My code

#include <stdio.h>

int main(void) {
    int Num[6]={10, 20, 30, 40, 50, 60};
    printf("%d\n",sizeof(Num) /4);
	// your code goes here
	return 0;

Learning course: Learn C
Problem Link: CodeChef: Practical coding for everyone

means sizeof(Nums) will return 24 as in 6(the size of the array)*4(int size);
and when u divide it by 4 it will return 6 the array size.