How many former U.S. presidents are still alive?
5
2
2
2
4
2
4
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
5
4
1
0
2
3
6
5
4
1
2
3
0
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
3
6
5
4
1
2
7
3
6
5
8
4
1
2
7
3
6
5
8
4
1
2
7
3
9
6
5
8
4
1
7
3
9
6
5
8
4
1
7
3
9
6
5
8
4
1
7
3
9
6
5
8
1
7
3
9
6
5
8
1
7
9
6
11
8
10
7
9
6
11
8
10
7
9
6
11
8
10
7
9
6
11
8
10
7
9
13
6
11
8
10
7
9
13
6
11
8
10
12
7
9
13
6
11
8
10
12
7
9
13
6
11
8
10
12
7
9
13
11
66
66
62
59
62
61
59
57