C67 I Want to Hear a Little Love Song

In the end, since the whole class was involved, they chose to play the game for more people. A game that sounded very simple, but in fact, it was a game that tested one's reaction.

Seven.

Each person had a number. If they encountered a number with seven or seven multiples, they could not say it out loud. If they knocked on the table, they would be punished if they could not react