Measuring with Rods How many different lengths is it possible to measure with a set of three rods? Explore this problem, and make some discoveries about number bases. Age 11 to 16 Exploring and noticing Working systematically Conjecturing and generalising Visualising and representing Reasoning, convincing and proving Being curious Being resourceful Being resilient Being collaborative Problem Problem How many different lengths is it possible to measure with a set of three rods? Explore this problem, and make some discoveries about number bases.