BEBRAS 2026 Grade 9-10 Round 2 Ext Question 7

Eighteen villages on an island are connected as shown. Whenever a village originates or newly receives information, its messengers send it to every neighboring village the following day. For example information from A reaches B,C,Q in one day, then D,E,F in two days.



If new information starts at J, how many days are needed for every village to receive it?