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The Kangaroo Tests turn 30: Can you solve the problems?
Diana Silva
20-03-2025
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![The 2025 Kangaroo trials at the Ernest Lluchh Institute in Barcelona](data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 9"%3E%3C/svg%3E)