### Metric Time

The day is divided into 100 parts (centidays) and the time is given to three decimal places. Think of it as a percent of the day that has passed.

Mid-day will be 50.000 LMT (Local Metric Time) in metric Time.

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### Mayan Time

The Mayans used a vigesimal (or base-20) numeral system. Mayan numerals use only combinations of dots (ones) and bars (fives) to form numerals for 1 to 19, and a stylised shell glyph for zero (not shown here).

The day is divided up into 65536 parts and written in hexadecimal (base-16) notation (A=10, B=11 ... F=15). The "0x" at the begining is just to signify that it is in hexadecimal notation, we could just leave it off or use some other signifier.

### Binary Time

Like hexadecimal time, the day is divided into 65536 parts, only we display it as a binary number using squares for bits, here using dark squares to represent 1 and white for 0.

### Octal Time

Octal Time uses a base-8 system (digits 0-7). The day is divided into 32768 parts for a total of 5 octal digits. The right-most digit updates about every 2.6 seconds (half the speed of hexidecimal time).

### Base 64 Time

Base-64 uses ASCII characters (in ascending order: A-Z, a-z, 0-1, +, and /).

Can you figure out how you would convert Base 64 time to mormal time?

## A Mathematics Lesson Starter Of The Day

Topics: Starter | Time

• Mr Ditta and 9Y-Ma1, Stokesley School
•
• 9Y-Ma1 argue that you have failed to subtract 1 hour on the last sunday of October hence 1 hour needs to be added accordingly.
• Year 6, St. Philip's Uckfield
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• We think that you have forgotten the extra hour when the clocks go back.
• Mary Brentnall, marybrentnall@hotmail.com
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• What about the extra hour when the clocks go back?
• Transum,
•
• The extra hour has now been included in the answer. Thanks Mr Ditta and 9Y-Ma1 at Stokesley School, Year 6 at St. Philip's Uckfield and Mary Brentnall.
• Mr Trainor And His P7 Class(All Girls), Mercy Primary School, Belfast
•
• My Primary 7 class in Mercy Primary school, Belfast, look forward to your mental maths starters every morning. The variety of material is interesting and exciting and always engages the teacher and pupils. Keep them coming please.
• Josh, BCJS Year 6 6J
•
• At BCJS in Mr Jenkins maths group, on 21/10/13 at 12 o'clock. The majority of the class said the answer was 1717 hours until the end of the year. The method we did was 71 days x 24 hours = 1704 add 12 hours = 1716 add 1 hour because of the time change = 1717. So our last answer was 1717.

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Christmas Present Ideas

It is often very difficult choosing Christmas presents for family and friends but so here are some seasonal, mathematics-related gifts chosen and recommended by Transum Mathematics.

## Equate board game

Here's a great board game that will give any family with school-aged kids hours of worthwhile fun. Christmas is a time for board games but this one will still be useful at any time of year. Games can be adapted to suit many levels of Mathematical ability.

For Maths tutors working with just one or small groups of pupils this game has proved to be an excellent activity for a tutorial. Deciding on the best moves can spark pertinent discussions about mathematical concepts.

Equate looks a bit like Scrabble--for aspiring mathematicians, that is. Designed by a real mathematician, it works like this: You put down tiles on a board and make points by correctly completing simple equations. Your nine tiles include both numbers and mathematical symbols; you can add on to previous plays both vertically and horizontally. more...

## How Not To Be Wrong

The maths we learn in school can seem like an abstract set of rules, laid down by the ancients and not to be questioned. In fact, Jordan Ellenberg shows us, maths touches on everything we do, and a little mathematical knowledge reveals the hidden structures that lie beneath the world's messy and chaotic surface. In How Not to be Wrong, Ellenberg explores the mathematician's method of analyzing life, from the everyday to the cosmic, showing us which numbers to defend, which ones to ignore, and when to change the equation entirely. Along the way, he explains calculus in a single page, describes Gödel's theorem using only one-syllable words, and reveals how early you actually need to get to the airport.

What more could the inquisitive adult want for Christmas? This book makes a cosy, interesting read in front of the fire on those cold winter evenings. more...

## Graphic Display Calculator

This handheld device and companion software are designed to generate opportunities for classroom exploration and to promote greater understanding of core concepts in the mathematics and science classroom. TI-Nspire technology has been developed through sound classroom research which shows that "linked multiple representation are crucial in development of conceptual understanding and it is feasible only through use of a technology such as TI-Nspire, which provides simultaneous, dynamically linked representations of graphs, equations, data, and verbal explanations, such that a change in one representation is immediately reflected in the others.

For the young people in your life it is a great investment. Bought as a Christmas present but useful for many years to come as the young person turns into an A-level candidate then works their way through university. more...

The analytics show that more and more people are accessing Transum Mathematics via an iPad as it is so portable and responsive. The iPad has so many other uses in addition to solving Transum's puzzles and challenges and it would make an excellent Christmas gift for anyone.

You have to hold iPad Air to believe it. It’s just 7.5 millimeters thin and weighs just one pound. The stunning Retina display sits inside thinner bezels, so all you see is your content. And an incredible amount of power lies inside the sleek enclosure. So you can do so much more. With so much less. more...

## Aristotle's Number Puzzle

It’s a bit of a tradition to give puzzles as Christmas Gifts to nieces and nephews. This puzzle is ideal for the keen puzzle solver who would like a challenge that will continue over the festive period (at least!).

This number puzzle involves nineteen numbers arranged into a hexagon. The goal of the puzzle is to rearrange the numbers so each of the fifteen rows add up to 38. It comes in a wooden style with an antique, aged look.

Keep the Maths in Christmaths with this reasonably priced stocking filler. more...

## The Story Of Maths [DVD]

The films in this ambitious series offer clear, accessible explanations of important mathematical ideas but are also packed with engaging anecdotes, fascinating biographical details, and pivotal episodes in the lives of the great mathematicians. Engaging, enlightening and entertaining, the series gives viewers new and often surprising insights into the central importance of mathematics, establishing this discipline to be one of humanity s greatest cultural achievements. This DVD contains all four programmes from the BBC series.

Marcus du Sautoy's wonderful programmes make a perfect Christmas gift more...

Click the images above to see all the details of these gift ideas and to buy them online.

 Teacher, do your students have access to computers?Do they have iPads or Laptops in Lessons? Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Transum.org/go/?Start=October21

Here is the URL which will take them to a related student activity.

Transum.org/go/?to=clockpairs

For Students:

For All: