Question 1
Count the total number of squares in the 3x5 grid below:
+---+---+---+---+---+
| | | | | |
+---+---+---+---+---+
| | | | | |
+---+---+---+---+---+
| | | | | |
+---+---+---+---+---+
For a 3x5 grid: (3×5) + (2×4) + (1×3) = 26