How many houses are in Hogwarts in the Harry Potter books?
4
7
7
7
5
7
5
7
5
7
4
5
7
4
5
7
4
5
7
4
5
7
4
5
7
4
5
7
4
5
7
4
5
7
4
5
7
6
4
2
5
7
6
4
2
5
7
6
4
2
5
7
6
4
2
5
7
6
4
2
5
7
6
4
8
2
5
6
4
8
2
5
6
4
8
3
2
5
6
4
8
3
2
6
4
8
3
2
6
4
8
3
2
6
8
3
2
6
8
3
2
6
8
3
2
6
8
3
2
9
6
8
3
2
9
6
8
3
2
9
6
8
3
2
9
10
6
8
3
2
9
10
6
8
3
2
9
10
8
3
9
10
8
3
11
9
10
8
3
11
14
9
10
8
3
11
14
9
10
1
seven
8
3
11
14
9
10
1
seven
17
3
11
14
9
10
1
seven
17
3
11
14
9
10
five
1
seven
17
11
14
13
9
10
five
1
seven
17
11
14
13
9
10