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Posts tagged with codes

Trojan Horse Tactics by Crypto-mathematicians

February12

In a modern version of the famous Greek Trojan Horse, The CIA secretly bought a company that sold encryption devices across the world. Then its spies sat back and listened! The company, Crypto AG, got its first break with a contract to build code-making machines for U.S. troops during World War II. Flush with cash, it […]

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Chewing Gum unlocks DNA and Mathematical Codes

December18

Lola, a young girl who lived in Denmark 5,700 years ago, had blue eyes, dark skin and dark hair. Her last meal included hazelnuts and mallard duck but no milk – she couldn’t stomach dairy. And the reason we know any of this is because she chewed on birch pitch, a material that functioned a […]

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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):

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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

Largest number between o and 1 million which does not contain the ‘n’ is 88

 

Rotation SAT Problem: Answer: 4 (see: https://www.youtube.com/watch?v=FUHkTs-Ipfg)

 

Which number has its letters in alphabetical order? Answer: F O R T Y

Hidden Rabbit? Clue: check the trees

How long for the stadium to fill? 45 minutes.

Where are you? the North Pole

Prize Object Puzzle: If Sue does not know where the prize is in the first question, it can’t be under the square. She must have been told it is under another shape. Apply this same logic to Colin. It is then obvious that the prize cannot be under a yellow object. That helps Sue eliminate her yellow shapes. Got the idea?

Algebra Puzzle: Answer = 1

Popular Math Problems Answers: 1, 1

Number of tabs? According to Lifehacker, the ideal number of tabs you should have open is nine. Yes, a single digit. To some, this is like playing a piano and only using a fraction of the notes!

Worst Graph? Where to start. What a visual mess and even some of the lines merge and are impossible to follow. A graph is a visual display of data, with the goal to identify trends or patterns. This is a spider’s web of information which fails to show a clear pattern at all. Solution? Well, different colors would help, or why not group in two or three graphs where trends are similar?

Number of different nets to make a cube is eleven – see this link

Homework Puzzle; The total value of the counters is 486, so halve this to get 243. Now, arrange the counters to equal this amount twice.

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

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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