How many mainline Super Mario Brothers games were released on the original NES?
3
3
2
3
2
3
2
3
2
3
2
3
4
2
3
4
5
2
3
4
5
1
2
3
4
5
1
7
2
3
4
5
1
7
2
3
4
5
1
7
2
3
4
5
1
7
2
3
4
5
1
7
2
3
6
4
5
1
8
7
2
3
6
4
5
1
8
7
2
3
6
4
5
1
8
7
2
3
6
4
5
1
10
8
7
2
3
6
4
5
1
10
8
7
2
3
6
4
5
1
10
8
7
9
2
3
6
4
5
1
10
8
7
9
2
6
4
13
5
1
10
8
7
9
6
4
13
5
11
1
10
8
7
9
6
4
13
5
11
1
10
8
7
9
6
4
13
5
11
1
10
8
7
9
0
6
4
13
5
11
1
10
8
7
9
6
13
5
11
0
1
10
8
7
9
6
13
11
1
10
8
7
9
6
13
11
10
8
7
9
6
13
11
12
10
14
8
9
6
13
ten