Question 1
Count the total number of squares in the 3x4 grid below:
+---+---+---+---+
| | | | |
+---+---+---+---+
| | | | |
+---+---+---+---+
| | | | |
+---+---+---+---+
For a 3x4 grid: (3×4) + (2×3) + (1×2) = 20