How many Harry Potter books are there?
7
3
5
3
4
5
3
4
5
3
4
5
3
4
5
3
4
5
2
3
4
5
2
3
7
4
5
2
3
7
4
5
6
2
3
7
4
5
6
2
3
7
4
5
6
2
3
7
4
5
6
2
3
7
4
5
1
6
2
3
7
4
5
1
6
2
8
3
7
4
5
1
6
2
8
3
7
4
5
1
6
2
8
3
7
4
5
1
6
2
8
3
7
4
5
1
0
6
2
9
8
3
7
4
5
1
6
2
9
8
3
7
10
4
5
1
6
2
9
8
7
10
4
1
6
2
9
8
7
10
1
6
2
9
8
11
7
10
12
1
13
6
2
9
8
11
7
10
12
1
13
6
2
9
8
11
7
10
12
1
13
6
2
9
8
11
7
10
12
1
13
6
9
16
8
11
7
10
12
1
13
6
9
16
8
11
10
12
1
13
6
9
66
62
132
168
256
114
108
58
144