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Multilink Cubes

If you had 36 cubes, what different cuboids could you make?

Single Track

Age 7 to 11
Challenge Level

Two passenger trains with four carriages each are facing each other on the main line, with a siding branching off between them. The siding is only long enough to fit one engine and two carriages. What is the best way to shunt the carriages so that each train can continue its journey?