Question 12
King Lý Thái Tổ visits the families in the village shown, using each road at most once. Entering and leaving along the two marked arrows, what is the greatest number of families he can visit?
Editorial convention needed for source answer 13: Enter at the lower arrow and leave at the upper arrow, without reusing any road. Stopping inside instead would permit all 14 families.
Editorial convention needed for source answer 13: Enter at the lower arrow and leave at the upper arrow, without reusing any road. Stopping inside instead would permit all 14 families.