Question 14
The first diagram shows a 6 by 6 board, and the second diagram shows an L-shaped piece consisting of four 1 by 1 squares. Paint as few of the squares of the 6 by 6 board black so that wherever the L-pieced piece is placed on the board covering four squares, at least one of the squares will be black. The L-shaped piece may be turned about or flipped over.
Detailed solutions are needed. Answer: At least paint ___ squares black.
Detailed solutions are needed. Answer: At least paint ___ squares black.