Question 2
Connect two unit squares side by side to form $2\times1$ tiles, and draw pictures in each square as shown below. We get a set of 21 different tiles with pictures.
These 21 tiles are placed in a $6\times7$ grid, as shown in the diagram below. Each tile is used exactly once, it can be rotated and placed in the grid either horizontally or vertically. The borders of the tiles are then erased and one can only see the grid with the pictures. Find the locations of the 21 tiles shown above in the grid below, by drawing the border of each tile.
These 21 tiles are placed in a $6\times7$ grid, as shown in the diagram below. Each tile is used exactly once, it can be rotated and placed in the grid either horizontally or vertically. The borders of the tiles are then erased and one can only see the grid with the pictures. Find the locations of the 21 tiles shown above in the grid below, by drawing the border of each tile.