It was a Maths ESD activity for the students during lunch time. Every class had representatives to join the competition. During the game, students had to answer questions about Mathematics in English in turn. It is a simple and interesting game for students to think innovatively as there are many ways to put the cards on the table. To win the game, it depends on the strategy and communication among teammates. It is a valuable activity for students to practise oral English and also think logically.