Class 6 A travels to a water park. The bus goes 2 km straight, turns right for 4 km, turns left for 3 km, and finally goes 8 km forward to its destination. Find the shortest school-to-park distance.
Source clarification: the prose does not mention a final turn, while the diagram shows one after the 3 km leg. For the intended question, follow that final right turn in the diagram.
Lucy and Linda receive the same 40 questions. For each question the first solver gets 4 points and the second solver 1 point. Lucy solves 20 questions, Linda 30, and their total score is 146. How many questions did both solve?
The graph shows Clover’s distance from home. She visits a grocery store, goes to the park, retreats in the rain to her grandparents’ house, then cycles to a bookstore and home. Her average speed for the whole trip is 8 km/h. How long does she stay at her grandparents’ house?
Intended model: motion is along one route without detours, horizontal graph segments are stops, and whole-trip average speed includes stops.
Andrea folds four identical numbered nets into cubes, then forms one block so that only faces with equal numbers touch. Find the largest sum of numbers on the block’s outer surface.
Pictured-shape clarification: use the 2 × 2 × 1 arrangement shown. A different connected arrangement is analysed separately in the proved extension.