Crossing the river with one boatLesson 189 of the lessons course of Mova's primary school: 4 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0).0The boat cannot cross empty, so after every trip across except the last one somebody must row it back.1So each trip there and back moves one fewer than the boat holds; the last trip across takes a full boat.211 people, a boat for 4: the first trip takes 4 across; each return and trip then adds 3 more: 4, 7, 10, 11.3That is 4 trips across and 3 back, 7 crossings.← previousThe longest equal piecesnext →Who am I? Number riddles↑ back to LessonsThis page in Markdown → https://md.mova.elamur.ai/free/en/corpora/school/lessons/189-boat-crossings/