Question 6
Germán wrote numbers in the cells of an $11 \times 11$ board in such a way that in each row the sum of the $11$ numbers equals $3$, in each column the sum of the $11$ numbers equals $3$, and in each $3 \times 3$ square the sum of the $9$ numbers equals $1$.
Give an example of a board like Germán's.
Give an example of a board like Germán's.