Question 6
The beavers have a place called the path of light, an area made of 36 special tiles. Each tile has a lamp, which changes state whenever a beaver passes over that tile.
Each time a beaver uses the path of light, they enter through the entrance, walk over the tiles and leave through the exit. From each tile they may step to a neighboring tile sharing an edge. After one journey, Beaver Alex obtains the lamp pattern shown below.
Alex does not like this pattern and wants to start again. First he must turn all the lamps on (white).
Which route below lets Alex do this? In the diagrams, Vào = entrance and Ra = exit.
Each time a beaver uses the path of light, they enter through the entrance, walk over the tiles and leave through the exit. From each tile they may step to a neighboring tile sharing an edge. After one journey, Beaver Alex obtains the lamp pattern shown below.
Alex does not like this pattern and wants to start again. First he must turn all the lamps on (white).
Which route below lets Alex do this? In the diagrams, Vào = entrance and Ra = exit.
