2
4
1
6
4
7
1
7
9
5
8
3
2
4
7
5
5
1
3
9
7
9
3
8
2
6
9
5
2
1
6
9
2
4
4
7
6
"Learning never exhausts the mind." — Leonardo da Vinci
"Learning never exhausts the mind." — Leonardo da Vinci
"An expert is someone who has made all the mistakes which can be made in a very narrow field." — Niels Bohr
"An expert is someone who has made all the mistakes which can be made in a very narrow field." — Niels Bohr