use your head

US /juːz jʊər hɛd/
UK /juːz jʊər hɛd/
"use your head" picture
1.

usar la cabeza, pensar con lógica

to think carefully and intelligently about something, especially to solve a problem

:
Come on, use your head! There must be a simpler way to do this.
¡Vamos, usa la cabeza! Debe haber una forma más sencilla de hacer esto.
If you would just use your head, you'd realize the answer is obvious.
Si solo usaras la cabeza, te darías cuenta de que la respuesta es obvia.