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