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Posts tagged with codes

The Unreasonable Effectiveness of Math

December9

A must see interview with Mathematician, and short-lived code breaker, Jim Simons – now a champion for hedge funds in the financial markets (you can check out more here):

Alien Signals need Math Wizz to Solve

November21

The Warkworth Radio Astronomical Observatory is located about 50 km north of Auckland, New Zealand. It is operated by the Institute for Radio Astronomy and Space Research, Auckland University of Technology. Here is a picture of it: Task 1: Which shape – the parabola (C) or circle (D) best fits the shape of the telescope? […]

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Bletchley Park – Home of the Codebreakers

March10

It was amazing. We had someone visit us recently who’s mother worked at Bletchley Park – home of the famous code breakers of World War II. Of course, her mother never told anyone – not even her husband – about the work she did. She had been a bright, young banker, and was selected for […]

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The Matrix was a mashup of…sushi!

October27

Yes, you probably read about it here last, but 20 years ago (ask your parents) the film The Matrix featured scrolling green ‘code’ which turned out to simply be sushi recipes! If you read Japanese and look closely you’ll be able to see it’s a jumble of characters: hiragana, katakana, and kanji. The production designer, […]

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Largest Prime Number for 2016

December26

As the new year approaches, you may be (or not be) interested to learn that the largest known prime number is 274,207,281– 1. This number is an incredible 22 million digits long and 5 million digits longer than the second largest prime number. Hang on to your primes you might ask, “Why are prime numbers important? […]

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Mathematics and The Universal Machine

January13

Wikipedia describes Alan Turing, as “a British pioneering computer scientist, mathematician, logician, cryptanalyst, philosopher, mathematical biologist, and marathon and ultra distance runner”. This description overlooks the enigma (puzzle) that surrounded this great mathematical mind. And it was an Enigma that challenged his mind to the ultimate test! Mathematicians love challenges that seem to defy logic. […]

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Codes and Ciphers

October27

    Scientists announced yesterday that they have used computer translation techniques to decipher a 250 year old, coded manuscript written for a secret society. The manuscript, called The Copiale Cipher, is a beautifully-bound, 105-page, 18th century handwritten from Germany. To view this remarkable document and read of the secrets it unlocked (thanks to some […]

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Post Support

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]

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