Each month Lucy’s doll total equals the sum of her totals in the previous two months. She has 8 dolls in April and 21 in June. How many did she have in January?
Anna travels 30 km straight, turns right for 25 km, turns right for 10 km, then turns right for another 10 km. Find the shortest distance between her starting point and her grandparents’ house.
Candace stacks 6 cubes of volume 8 cm³ each as shown. She paints all exposed surfaces except the bottom. Find the total unpainted area of the boxes in cm².
Nine egg packets contain 3,7,8,10,11,12,14,15,20 eggs. Sofia and Nana buy 4 packets each, and Nana’s egg total is twice Sofia’s. How many eggs are in the remaining packet?
Lines are drawn on three faces of a cuboid. The ant starts at the marked corner and moves toward the sugar along drawn lines or the edges, always getting closer to the sugar and farther from its start. How many routes are possible?
Source clarification: “the edges” can be read in two ways. For the intended reference-key interpretation, use only the visible grid network and its boundary edges on the three shown faces. The solution also analyses allowing every cuboid edge.
Father leaves home at 09:00, goes to the park, then Lucy’s camp, then home. The graph gives his distance from home. His average speed over the entire trip is 24 km/h. When does he reach the camp?
Intended model: travel is along one route without detours; the graph’s flat part is a stop, and whole-trip average speed includes that stop.
Anna,Ben,George,Sarah must pass through a dark tunnel. At most two may travel together, carrying their single candle. A pair moves at the slower person’s pace. Their one-way times are shown. What is the minimum total time to get everyone through?