Skip to content / Đến nội dung
ThichHocToan.com

MathNet 2026 — Part 02 Question 167

Math Olympiad Vault · MathNet 2026 — Part 02

Question 167

Three couples dine every Saturday in the same restaurant, always at the same table. The table is round and the couples agreed that
a. never had a husband and wife sit at the table as neighbors; and
b. The six at the table will be different every Saturday. Disregarding rotations in the table layouts, for how many Saturdays can these three couples go to this restaurant without repeating their disposition at the table?