Pause the video now if you want to  figure it out for yourself Answer in 3 Answer in 2 Answer in 1 You could, of course, take  all eight batteries and begin testing the 28  possible combinations.
[Suspende aqui o vídeo, se quiseres resolver sozinho. [Resposta em: 3 [Resposta em: 2 [Resposta em: 1] Claro que podes agarrar as oito pilhas e começar a testar as 28 combinações possíveis.