Question 11
Tom draws a grid with three rows A, B, C and three columns 1, 2, 3. Every square initially contains 0. A square is named by its row followed by its column; for example, the top-left square is A1.
Tom calls out some square names in order. Each call increases the number in that square by 1. Which grid results after he calls A1, A3, B1, B3, C1, C3, A1, A3, B1, B3, A1, A3?
Tom calls out some square names in order. Each call increases the number in that square by 1. Which grid results after he calls A1, A3, B1, B3, C1, C3, A1, A3, B1, B3, A1, A3?
