PeeCleemens
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Wondrous Arithmetic : Division
Remember having to divide numbers by hand ? If you have a rational number you can move from fractional form (a/b) to decimal form and back. Going from fractional to decimal form is done by performing the long division method. Going the other way is done using a ‘trick’. Any rational number written in decimal…
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Volkomen Kwadraten en Irrationale Getallen
Een irrationaal getal is een reëel dat niet kan geschreven worden als a/b met a ∈ ℤ (een geheel getal) en b ∈ ℤ0 (een natuurlijk getal). Een getal is een volkomen kwadraat als het het kwadraat is van een geheel getal. Een paar voorbeelden zijn 1, 4, 16 etcetera. Een ‘interessante’ eigenschap van volkomen…
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Perfect Squares & Irrational Numbers
An irrational number is a real number that cannot written in the form a/b with a ∈ ℤ (a whole number) and b ∈ ℤ0 (a natural number or whole number excluding 0). A number is a perfect square if it is the square of a whole number. A few examples are 1, 4, 16…
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Wondrous Arithmetic
Here at home we just had exams again and I helped my daughter preparing for her math exam. We started doing this during the 2020 lock down and we have continued since then. Surprisingly enough I still know most of the math I got in high school more than 30 years ago. This is in…
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Wonderbaarlijk rekenen
Het waren weer examens en ik heb mijn dochter wat geholpen bij de voorbereiding van haar wiskunde examen. We zijn daar mee begonnen tijdens de lockdown van 2020 en ze had er blijkbaar iets aan dus doen we zo voort tot ze het niet meer nodig vindt. Het was verrassend voor mij dat ik na…
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Genius. The Life and Science of Richard Feynman, James Gleick (ISBN 978-0679747048, Vintage)
After having reread the collected Feynman anecdotes from Surely You’re Joking and What do you care ? in the Classic Feynman edition I wanted to reread this biography by James Gleick again. The main reason being that the anecdotes focus on stories that happened to Feynman leaving out most of the science. Originally I read…
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Fist of Fury
The second movie starring Bruce Lee. This is a classical story in the martial arts movie genre with a Chinese hero fighting for the honour of the Chinese agains foreign oppression and aggression. A superior Chinese martial artist is murdered after being poisoned by the Japanese. All typical Bruce Lee movie elements appear again with…
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The Big Boss
I recently watched ‘The Big Boss’ again with my son. This movie from 1971 start Bruce Lee in his first major film role as the leading star. It is vintage Bruce Lee, including extreme close ups of his face, grimacing, the tasting of blood before he really unleashes his devils, the howling sounds he makes…
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Apollo 13
This movie with Tom Hanks playing Jim Lovell came out in 1995. It is about the disastrous Apollo 13 flight and based on the book ‘Lost Moon’ by Jim Lovell. Apollo 13 was the third flight scheduled to land on the moon and so got little prior attention from the press. That changed dramatically after…
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Harry Potter and the Prisoner of Azkaban, J.K. Rowling (ISBN 978-1408855676, Bloomsbury)
The third Harry Potter book. As you probably know each Potter book follows Harry during a year at Hogwarts school of Magic. So, in book 1 he was 11 years old and going to his first year. In The Prisoner of Azkaban we meet Harry during the summer at his uncle and aunt awaiting the…
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