Math Riddles, Math Tricks, Murderous Maths, Simon's sketch book

Math Fun

magic rectangle
magic square
challenging Dad to guess what the magic square and the magic rectangle are
fun multiplication shortcuts
favourite Brilliant.org problem (Simon has actually carried out an experiment with in real life marbles is a sack to see whether the probability predicted is correct)

Simon finds the explanation on Brilliant.org incomplete, so he started a discussion about it on the Brilliant community page: https://brilliant.org/discussions/thread/games-of-chance-course-marble-problem/?ref_id=1570424

challenging Dad with the Brilliant.org problem
chalenging Dad with the Brilliant.org problem (Simon has also taken this problem to show to his French teacher)

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