Question 18
The numbers $1,$ $2,$ $3,$ $4,$ $5$ are to be arranged in a circle. An arrangement is *bad* if it is not true that for every $n$ from $1$ to $15$ one can find a subset of the numbers that appear consecutively on the circle that sum to $n.$ Arrangements that differ only by a rotation or a reflection are considered the same. How many different bad arrangements are there?