Fonia noticed that her phone number read the same when viewed upside down.

Her number began 081 and was followed by seven digits.

The two digit number formed by the fifth and sixth digits is divisible by eleven.

The two digit number formed by the fourth and fifth digits is divisible by nine.

The two digit number formed by the sixth and seventh digits is a square number.

What is Fonia's phone number?

## A Mathematics Lesson Starter Of The Day

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Topics: Starter | Number | Puzzles

• Sue Mainstone, Sir Charles Lucas arts college
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• Should have said todays number was planindromic as well
• Micky Bullock, Harrogate
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• Another solution is 0816336180.
• Miss Gilleece, Boldon School
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• My 9A1 got the answer in 3.2 minutes, Chris was the first to come up with the correct answer.......which is quite amazing considering!!!
• Mrh, Neb
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• I had a student had completed this in less than two minutes! Can anyone beat that!
• Jay, Yeates
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• Cheryl Joinson, Sychdyn School
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• I'm using starter of the day every mornign in my primary class.
Our answer was 0811881180 but we have no way of checking if we are correct.
• Geraint White, Hadleigh High School
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• I got 0819116180.
• Fran,
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• Another soloution is 0816699180.
• Cheryl, Sychdyn Primary School
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• Geraint & Fran sorry but both your answers are wrong - the corect answer is at the bottom of this page - and my primary school class got it right! :-).
• Sally S, Barham School
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• Love reading the comments - sometimes V competitive between teachers themselves;).
• Mr. Dean, Varee International
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• 5DC, Lee On The Solent Junior School
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• We think the answer is 0811881180 :).
• Top Group Y5, ST JOHN'S SCHOOL
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• The boys loved this.
• Mr P Darch, FMS - Tom, Luke And Lucy
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• Enjoyed this and my Year 6 class solved in about 4 minutes.
By the way the only answer is 0811881180 - the others either do not look the same upside down or do not satisfy the other rules.
• Mr Staples, Otamatea High School
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• My students enjoyed this and some found it quite easy Two boys completed in 2 minutes.
• Year 8D, Gresham's Prep School
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• We did this as a team
0811881180
Forgot to time ourselves - will challenge you all next week!

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Can you make up some clues for your own phone number?

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## Have you read Craig's book yet?

Craig Barton must surely be the voice of Mathematics teachers in the UK. His wonderful podcasts interviewing the industry experts have culminated in this wonderful book. As Craig says: "I genuinely believe I have never taught mathematics better, and my students have never learned more. I just wish I had known all of this twelve years ago..." more...

"How I wish I'd taught Maths" is an extraordinary and important book. Part guide to research, part memoir, part survival handbook, it’s a wonderfully accessible guide to the latest research on teaching mathematics, presented in a disarmingly honest and readable way. I know of no other book that presents as much usable research evidence on the dos and don’ts of mathematics teaching in such a clear and practical way. No matter how long you have been doing it, if you teach mathematics—from primary school to university—this book is for you." Dylan Wiliam, Emeritus Professor of Educational Assessment, UCL.

## Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

 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=March8

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

Transum.org/go/?to=square

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