Hay tuyệt bạn ak!

Phân tích thành số nguyên tố

12 = 3 x 2 x 2

Vậy số cần tìm là

2^3-1 . 3^2-1 . 5^2-1 = 60 

1. The festival featured many folk games, bamboo swings, are rice cooking competition, Lions dancing, human chess game, a water pump performance, wrestling, crossbow shooting, etc

2. There was a ceremony offering incense, 5 fruit trays and specialties, Chung cakes and day cakes, which are two traditional foods in Vietnam

3. Government leaders will lead a procession up to the Upper temple.