How many major mountain ranges are there in the United States?
3
3
3
2
3
2
4
3
2
4
3
5
2
4
3
5
2
4
3
5
2
4
3
5
2
4
3
5
2
4
3
5
2
1
4
3
5
2
1
4
3
5
6
2
1
4
3
5
6
2
1
4
3
5
6
2
7
1
4
3
5
6
2
7
1
4
3
5
6
2
7
1
4
3
5
6
2
7
1
4
3
5
6
2
7
8
1
4
3
5
6
2
7
8
1
4
3
5
6
2
7
8
1
4
5
6
2
7
8
1
4
5
6
7
8
1
0
4
5
6
9
7
8
1
10
5
6
9
0
7
8
1
10
6
9
7
0
8
1
10
6
9
7
8
1
10
6
9
7
8
1
10
6
9
7
8
1
10
6
9
7
12
8
1
ten
10
6
9
7
11
12
8
10
6
9
ten
7
11
12
8
10
13
9
7
11
12
ten
8
3 major
10
13
9
14
7
11
12
8
10
13
9
62