How many mathematicians won the 2015 Abel Prize?
2
1
1
2
1
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
4
2
1
3
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
5
4
2
1
3
0
5
4
2
1
3
5
0
4
2
3
5
4
2
0
3
5
4
3
0
5
4
5
6
0
4
5
6
4
0
5
6
4
0
5
6
4
5
6
4
7
5
6
7
5
6
7
5
6
7
8
5
6
7
8
5
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
6
7
8
9
6
11
7
8
9
6
11
10
7
8
9
6
11
10
7
8
13
9
6
11
10
7
8
13
9
6
11
10
7
8
13
9
11
10
7
8
13
9
11
10
7
8
13
12
9
11
66
62
66
62