I have one older sister, one younger brother and one younger sister. In other words, I am the second of four in my family. So, how many siblings do I have?
The surprising answer in Brunei is: four. Bruneians seem to include themselves when stating how many siblings they have. For example, I have a recording of one of my students saying he has seven siblings when it turns out he is actually the fourth out of seven, so in my English, we would say he has six siblings. And I confirmed this way of counting with my first-year class.