Question 15
To prevent a wolf from sneaking into the garden and taking sheep, the beaver places dogs to guard the gates. One dog guards a region as shown below.
The wolf cannot sneak through gate 1, but can enter through gate 2. In the following garden, what is the smallest number of dogs needed to guard the gates?
The wolf cannot sneak through gate 1, but can enter through gate 2. In the following garden, what is the smallest number of dogs needed to guard the gates?