Question 3
The mock battle is one of the most eagerly awaited activities at the Bebras festival. Each beaver brings a pillow as their “weapon”. Beavers with the same pillow pattern form a team. Every team has exactly 3 members. If more than 3 bring a pattern, only 3 may play; if fewer than 3 bring it, none may play. The pillows are shown below. How many beavers cannot play?
