The 5*5 grid shown contains a collection of squares with sizes from 1*1 to 5*5. How many of these squares contain the black square?
+2666 Let's count by case:
1 x 1 square: 1 square
2 x 2 squares: 4 squares
3 x 3 squares: 4 squares
4 x 4 squares: 4 squares
5 x 5 squares: 1 square
Now, can you tell me how many squares contain the black square?
