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I think that's a dangerous line of reasoning. Why not learn to memorize ingredients on a can of soup? That is also exercise for your brain.

Algebra lets us describe relationships between unknown quantities. Nearly every physical law is expressed as an algebraic equation (or Calculus, which requires it). It's the lingua franca of describing the world. That's why we need it :).



Memorizing trains memory, that's not the same exercise.




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