Chris Impens @ Valvas
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24 February 2021
Golden Maths — Advanced arithmetic (Ridley's Theorem)
18 February 2021
Golden Maths — Advanced arithmetic (Hurwitz's Theorem)
17 February 2021
Golden Maths — Elementary arithmetic
16 February 2021
Golden Maths — Geometry
13 February 2021
Sunflower heads and other parabolic spirals
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