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If the purple rod is the whole, what colour rod is one half?

What fraction of the purple rod are each of the other rods?

How many dark green rods, for example, are the same as one half?

If the purple rod is the whole, what colour rod is one third?

What fraction of the purple rod are each of the other rods?

How many dark green rods, for example, are the same as one half?

If the purple rod is the whole, what colour rod is one third?