A little grey mouse called Delia lives in a hole in the bottom of a tree in a small square garden (A).
The garden is paved with 6 large square paving stones in each direction and has a circular pond right in the middle that has a diameter of 3 of the paving stones. Delia's tree is at the left hand corner at the bottom of the garden. At the top right hand corner of the paved area there is a bird table (B).
How many days will it be before Delia has to take the same route again?