Mathematical Puzzle 'Kangaroo Numbers' Explores Multiplication Tables Through Marsupial Metaphor

A mathematical puzzle titled 'Kangaroo Numbers' presents a conceptual challenge involving multiplication tables. The puzzle employs marsupials as a metaphorical framework, suggesting a nested or recursive structure reminiscent of Russian dolls. Mickaël Launay, a mathematician and science communicator, authored this puzzle as part of a series published by Le Monde. The puzzle appeared in issue number 97 of the publication's science section on April 18, 2026. Launay invites readers to engage with the mathematical problem by replicating the conceptual approach. The puzzle's description uses playful language, referring to 'good old multiplication tables' as the foundation for the marsupial-themed mathematical exercise. This installment continues Le Monde's tradition of publishing scientific puzzles and brainteasers for its readership. The publication maintains a dedicated science section that regularly features such intellectual challenges.