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Lah number

math Maturity 11-13

You can group things in many ways.

Lah numbers.svg
Lah numbers.svg
Imagine you have some toys. You can put them in lines. One man found a way to count these lines. It helps us see patterns. Math is full of fun puzzles. Can you find a pattern?

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File:Lah numbers.svg
Lah numbers.svg
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📚 Content adapted from Wikipedia | Readability: FK 14.6 | Vital Level 5