Question 25
Kiko and 5 of her friends are seated around a restaurant table. Each person introduces themself, telling everyone how many of the people at the table they’ve previously met. Naturally, Kiko has met all 5. Coincidentally, the other 5 have all met the same number as each other. Which of the following is not a possibility for this number that all 5 of Kiko’s friends have met?
