The Iwatobi Swim Club needs one more member before it can participate in relays.  Nagisa has set his sights on his classmate Rei, who is a member of the track team.  Despite Rei's refusal to join, but Nagisa appears intent on recruiting Rei into the swim club.
That was a trick question.
Das war eine Fangfrage.
Esa pregunta era un gancho.
Fijo que era una pregunta trampa.
C’était une question-piège.
Ah, è stato un problema 
difficile da risolvere.
Aquela questão foi difícil.
Это был вопрос с подвохом.