Plane Numbers

A self-checking, interactive version of this activity with 30 different puzzles is here.

Starter of The Day Transum Mathematics Topics

Topics: Starter | Arithmetic | Number | Problem Solving

K Hudson, Drigg
Looks easy but proved quite tricky. Nice one!
Helen McKenna, Elgin
Hard to start, but then easy. We found 10 different solutions in 5 minutes.
Class 2, Blackboys Primary School
Ethan Peck found it a tough challenge, but soon got the hang of it. "It was really fun but tricky," says Poppy. "I enjoyed the challenge and found 1 solution," commented Kizzifer Budd. Top challenge.
Mr M's Year 7s, CCS, Bali
We noticed that you can only have an odd number in the middle (ie. 1,3 or 5). The total number is either 11,12 or 13 depending on what number you put in the middle. Great starter, thanks. :D.
John Paul Academy, Glasgow
Enjoyed but kinda difficult!
Paula, Coln House
I teach in a SEBD secondary school, these starters help the classes to settle and they (the pupils) (mostly) enjoy the challenge. Sometimes we might spend longer on a problem if the pupils are very engaged.
If we vote on a starter I always ask for their input and comments.
For more practical starters we often cut up paper and model the problem, I find this helps , I also try to create a sense of controlled urgency as this helps the pupils concentrate and focus.
Sometimes the starters are too complex, or wordy, so I quickly search and find a more appropriate problem.
I think these starters are very useful as you can extract lots of mathematics from them to suit your particular level, style and type of class.
Thank you.
Mrs Clay's Y5 Maths Set GMS, Bedfordshire
We found three possible solutions, because we would not allow jiggling of the digits eg we think 4+1+6= 2+1+3+5 is the same as 6+1+4= 3+1+2+5 and the digit used twice must be odd. :)
4+1+6 = 2+1+3+5
5+3+4 = 6+3+2+1
6+5+2 = 4+5+1+3.
Dan's Dad, Milton Keynes, UK
There's a reason why the number in the middle must be odd:
First add up all the numbers: 1+2+3+4+5+6=21
If you put an odd number in the middle, for example 1, the numbers that are left now add up to 20.
And 20 can be split into two equal halves of 10
i.e. 6+4 and 2+3+5 both equal 10
So your solution is
6+1+4 = 2+1+3+5
Using any odd number in the middle will leave you with equal halves to share up and across
If you try it with a 2 in the middle, you are left with the numbers#
1+ 3+4+5+6=19
And 19 cannot be shared equally up and across.
Mr Eagle, Eagletown
My mixed year 5/6 thought it was an absolute doddle. They thoroughly enjoyed the compexities of this challenge and look forward to the next one!
Mr. Townsend, Harmondsworth Primary Y3/4
We found one solution as a starter activity. We used 4, 3, 5 in the vertical column and 1,3,2,6 in the horizontal. It was challenging!
TKe, Hull
After finding how many 'unique' solutions, get the class to calculate how many permutations there are.
Mrs K, Maths Cadets
We found these a little tricky but if we had more time, we would have found more.
Mr G, Kenya
My class loved this. We found 3 solutions in total not including moving the numbers to different locations within their row or column - addition is commutative so it didn't matter where the numbers location was.
There were 3 solutions and you hade to have an odd number in the central square.

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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Answers

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.

Go Genius Maths

Transform maths practice into an exciting adventure with Go Genius Maths! This award-winning board game is designed to make learning maths enjoyable and engaging for children aged 7 and above. Perfect for family game nights or classroom activities, Go Genius Maths helps players develop essential arithmetic skills while having heaps of fun.

Whether you’re looking for a gift to inspire young minds or a tool to supplement maths education, Go Genius Maths is the ultimate choice. Spark curiosity, nurture mathematical talent, and turn learning into an unforgettable journey!

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... #ad

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 this 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... #ad

Apple iPad Pro

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 gift for anyone.

The redesigned Retina display is as stunning to look at as it is to touch. It all comes with iOS, the world's most advanced mobile operating system. iPad Pro. Everything you want modern computing to be. more... #ad

Before giving an iPad as a Christmas gift you could add a link to iPad Maths to the home screen.

Craig Barton's Tips for Teachers

Teaching is complex. But there are simple ideas we can enact to help our teaching be more effective. This book contains over 400 such ideas." more... #ad

"The ideas come from two sources. First, from the wonderful guests on his Tips for Teachers podcast - education heavyweights such as Dylan Wiliam, Daisy Christodoulou and Tom Sherrington, as well as talented teachers who are not household names but have so much wisdom to share. Then there's what he has learned from working with amazing teachers and students in hundreds of schools around the world.

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... #ad

Christmas Maths

This book provides a wealth of fun activities with a Christmas theme. Each photocopiable worksheet is matched to the Numeracy Strategy and compatible with the Scottish 5-14 Guidelines. This series is designed for busy teachers in the late Autumn term who are desperate for materials that are relevant and interesting and that can be completed with minimun supervision.

All the activities are suitable for use by class teachers, supply teachers, SEN teachers and classroom assistants and cover topics such as 'How many partridges did the true love give all together?' and 'Filling a sleigh with presents by rolling a dice!'. Children will have lots of fun working through the Christmas Maths themes but also gain valuable skills along the way.

A great source of ideas and another reasonably priced stocking filler. more... #ad

A Compendium Of Mathematical Methods

How many different methods do you know to solve simultaneous equations? To multiply decimals? To find the nth term of a sequence?

A Compendium of Mathematical Methods brings together over one hundred different approaches from classrooms all over the world, giving curious mathematicians the opportunity to explore fascinating methods that they've never before encountered.

If you teach mathematics to any age group in any country, you are guaranteed to learn lots of new things from this delightful book. It will deepen your subject knowledge and enhance your teaching, whatever your existing level of expertise. It will inspire you to explore new approaches with your pupils and provide valuable guidance on explanations and misconceptions. more... #ad

Math with Bad Drawings

I had been tutoring the wonderful Betsy for five years. When the day came for our last ever session together before the end of her Year 13, I received this beautiful book as a gift of appreciation.

This a very readable book by Ben Orlin. I'm really enjoying the humour in the writing and the drawings are great.

Ben Orlin answers maths' three big questions: Why do I need to learn this? When am I ever going to use it? Why is it so hard? The answers come in various forms-cartoons, drawings, jokes, and the stories and insights of an empathetic teacher who believes that mathematics should belong to everyone. more... #ad

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

Maths T-Shirts

Maths T-Shirts on Amazon

Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon link. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.

Educational Technology on Amazon

Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:

Transum.org/go/?Start=February3

However it would be better to assign one of the student interactive activities below.

Laptops In Lessons

Here is the URL which will take them to the interactive version of this activity with 30 different variations.

Transum.org/go/?Num=6